HHMI's BioInteractive

Video Clips Index

Neuroscience

From the 2008 Holiday Lectures—Making Your Mind: Molecules, Motion, and Memory
	Clive Wearing: A man without memory Clive Wearing has lost his ability to remember and lives in a perpetual state of having just awoken. 1 minute 15 seconds

	Demo: Phrenology Dr. Kandel illustrates the practice of the now-debunked theory of phrenology. 1 minute 4 seconds

	A patient with conduction aphasia A patient can both comprehend and articulate language, but cannot verbalize what is a clear idea in her mind. 1 minute 9 seconds

	Clive Wearing plays piano despite memory deficit Even though Clive Wearing cannot remember people or events, his piano-playing skills are intact. 1 minute 6 seconds

	Demo: SHH concentration and eye position A reduction in the level of sonic hedgehog (SHH) gene expression can lead to cyclopia. 1 minute 22 seconds

	Demo: The electrical activity of Dr. Jessell's arm A live recording of muscle activity from Dr. Jessell's biceps and triceps muscles. 2 minutes 15 seconds

	Growth cones in action The growth cones of two neurons sense and interact with one another. 34 seconds

	Long-distance neuronal path-finding Retinal axons travel across the brain, reading navigation cues, to find appropriate targets. 31 seconds

	Contact repulsion of a growth cone A growth cone contacts a repellant molecule on another axon, collapses, and withdraws. 1 minute 5 seconds

	Computer analysis of human movement Dr. Jessell's leg muscle activation patterns are recorded during walking. 56 seconds

	Demo: Testing a student's proprioceptive reflex A knee-jerk reflex depends on a simple circuit of proprioceptive sensory neurons and spinal motor neurons. 1 minute 21 seconds

	Demo: Proprioception makes raising a mug easy The average person has no difficulty raising a coffee mug. 52 seconds

	Without proprioception, raising a mug is difficult A person with a disease that kills proprioceptive neurons has severe problems with the simplest of movements. 1 minute 36 seconds

	Behavior of mice that lack proprioception Genetically engineered mice lacking proprioceptive sensory axons are not capable of well-coordinated walking. 25 seconds

	Walking versus hopping In a giraffe's walk, left and right limbs move alternately, while in a kangaroo's hop, opposing limbs move together. 1 minute 12 seconds

	Dr. Jessell's muscle activity when he hops or walks Electrical activity recorded from the leg muscles reveals different patterns of activation during different gaits. 45 seconds

	Mutant mice with crossed excitation hop Kangaroo-like hopping when spinal cord excitatory interneurons cross the midline to stimulate both sides. 1 minute 18 seconds

	Ian Waterman: Compensating for proprioceptive loss In the absence of proprioceptive feedback, some individuals can compensate by using visual feedback. 1 minute 41 seconds

	Demo: Touching thumb to fingers with proprioception Proprioceptive feedback makes it easy to touch one's thumb to one's fingers without looking. 57 seconds

	Waterman touching thumb to fingers without feedback In the absence of proprioception and visual feedback, it is impossible to touch thumb to fingers accurately. 1 minute 15 seconds

	Demo: Using spatial memory to clear an obstacle Even without visual feedback, we are able to negotiate an obstacle using spatial memory. 2 minutes 9 seconds

	Cat remembers obstacle location for many minutes Even when distracted by food, the cat's brain encodes and retains the location of an obstacle. 1 minute 39 seconds

	Demo: Meet a live Aplysia californica Aplysia californica is a marine snail with a simple nervous system suitable for research on learning and memory. 1 minute 40 seconds

	Aplysia's gill-withdrawal reflex and sensitization A touch to the Aplysia's siphon causes a gill withdrawal, a simple reflex for studying memory. 1 minute 25 seconds

	Mice navigate a Barnes maze to test spatial learning Mice can be trained to use spatial cues to navigate a maze that tests their ability to remember specific locations. 2 minutes 14 seconds

	Visualizing learning Dr. Harshad Vishwasrao guides you through a collection of images showing neuronal growth and synaptic formation representative of anatomical changes that occur during learning. 5 minutes 39 seconds

	Interview with Dr. Thomas Jessell An interview with Dr. Jessell. 6 minutes 12 seconds

	Interview with Dr. Eric Kandel An interview with Dr. Kandel. 6 minutes 20 seconds

	Interview with Dr. Adam Hantman An interview with Dr. Adam Hantman, a post-doctoral student in Thomas Jessell's lab. 3 minutes 25 seconds

	Interview with Tessa Hirschfeld-Stoler An interview with Tessa Hirschfeld-Stoler, a lab technician in Eric Kandel's lab. 3 minutes 23 seconds

	Interview with Priya Rajasethupathy An interview with Priya Rajasethupathy, an M.D./Ph.D. student in Eric Kandel's lab. 3 minutes 44 seconds

	Interview with Dr. Laskaro Zagoraiou An interview with Dr. Laskaro Zagoraiou, a post-doctoral student in Thomas Jessell's lab. 3 minutes 31 seconds

From the 2003 Holiday Lectures—Learning From Patients: The Science of Medicine
	Learning from Mice: The Science of Transgenic Technology What do humans, flies, and worms have in common? More than you might think. See how transgenic organisms are engineered, and how they enable researchers to study genetic diseases. 11 minutes 7 seconds

	Spinocerebellar Ataxia Case Study Dr. Huda Zoghbi interviews Milan Cloud, a patient who has inherited the neurological disorder spinocerebellar ataxia 1, or SCA1. 3 minutes 29 seconds

	Rett Syndrome Dr. Zoghbi introduces the topic of Rett syndrome by showing how development usually progresses in a young girl. She then shows an excerpt from Silent Angels, introduced by Julia Roberts, which shows how Rett syndrome affects development. 2 minutes 51 seconds

	Rett Syndrome Mouse Dr. Zoghbi shows how a mouse that has been given the gene responsible for Rett syndrome exhibits some of the same neurological symptoms as human Rett patients. 1 minute 13 seconds

	SCA1 Mouse on Rotarod Dr. Zoghbi demonstrates how mice that have been given the gene responsible for spinocerebellar ataxia 1 (SCA1) are tested on a device called a rotarod to quantify the amount of ataxia present. 34 seconds

	Interview with Dr. Huda Zoghbi An interview with Dr. Zoghbi. 5 minutes 51 seconds

	Interview with Jennifer Gatchel An interview with Jennifer Gatchel, a scientist in Dr. Zoghbi's lab. 4 minutes 50 seconds

Infectious Disease

From the 2007 Holiday Lectures: AIDS: Evolution of an Epidemic
	Adherence and resistance Adam Barrett, a nurse who is HIV positive, discusses his first symptoms and the challenges of adhering to a drug regimen. 7 minutes 41 seconds

	Adhering to an antiretroviral regimen Adam Barrett describes his seven-drug antiretroviral regimen and the importance of adherence. 1 minute 9 seconds

	Benefits of an antiretroviral regimen Zinhle Thabethe describes how antiretroviral therapy has changed her life. 1 minute 50 seconds

	CTL killing a target cell Video microscopy of a cytotoxic T lymphocyte in action. 1 minute 16 seconds

	Demo: Rapid AIDS virus test A live demonstration of how a rapid antibody-based HIV test works. 7 minutes 40 seconds

	Demo: Student adherence activity Using tic tac mints as anti-HIV drug stand-ins, students experience the challenges of adhering to an antiretroviral regimen. 4 minutes 18 seconds

	First AIDS patients Dr. Michael Gottlieb was the first physician to notice the new disease of AIDS. 5 minutes 40 seconds

	HIV's origins in Africa Dr. Beatrice Hahn discusses how HIV originated in Africa by cross-species transmission from chimpanzees to humans. 1 minute 12 seconds

	Living with HIV Catherine Gaynes, an HIV-positive patients, discusses her HIV diagnosis, how her family reacted, and avoiding HIV infection. 4 minutes 46 seconds

	Origin of HIV Dr. Beatrice Hahn's research has traced the origin of HIV to chimpanzees in Cameroon. 5 minutes 31 seconds

	South Africa: The "gogo" (grandmother) When parents die of AIDS, the orphans often go to live with a "gogo," the Zulu word for grandmother. 2 minutes 7 seconds

	South Africa: St. Mary's Hospital How a South African hospital is coping with the HIV/AIDS epidemic and its many related healthcare issues. 4 minutes 11 seconds

	South Africa: Traditional healers Doctors hope to encourage healers to direct their patients to clinics for TB and AIDS-related diseases. 2 minutes 19 seconds

	South Africa: Tuberculosis A glimpse of the TB ward at a South African hospital, illustrating an illness associated with the AIDS epidemic. 3 minutes 8 seconds

	South Africa: Umndeni "Family" Care Program A program designed to provide health care and housing to South Africans living in poverty. 3 minutes 51 seconds

	South Africa: WhizzKids Using soccer to teach children how to make important life choices and how to avoid HIV infection. 3 minutes 5 seconds

	Symptoms of acute HIV infection Adam Barrett remembers his symptoms of acute HIV infection. 57 seconds

	Interview with Bisola Ojikutu An interview with Dr. Ojikutu. 5 minutes

	Interview with Bruce Walker An interview with Dr. Walker. 4 minutes 56 seconds

	Interview with Kwame Atsina An interview with Kwame Atsina, an undergraduate who discusses what it's like to be in a lab doing scientific research. 4 minutes 3 seconds

	Interview with Silvia Caballero An interview with Silvia Caballero, an undergraduate who discusses what it's like to be in a lab doing scientific research. 4 minutes 8 seconds

	Interview with Tobi Ogbechie An interview with Tobi Ogbechie, an undergraduate who discusses what it's like to be in a lab doing scientific research. 3 minutes 43 seconds

	Interview with Katie Walter An interview with Katie Walter, an undergraduate who discusses what it's like to be in a lab doing scientific research. 3 minutes 27 seconds


From the 1999 Holiday Lectures: 2000 and Beyond: Confronting the Microbe Menace
	Bacterial Growth Dr. Brett Finlay shows how bacteria can grow rapidly to incredible numbers, and also explains what limits this explosive growth. 54 seconds

	Cheek Cells and Bacteria Dr. Brett Finlay enlists a student volunteer to show the surprisingly high amount of bacteria found in his own mouth. 1 minute 27 seconds

	Listeria Infection Demonstration Dr. Finlay and a student volunteer show how Listeria infects a cell, using a marble and some yellow gelatin. 1 minute 4 seconds

	Listeria Video This microscope video shows how live Listeria move via actin filaments in an infected cell. 1 minute 7 seconds

	Penicillin acting on bacteria Penicillin, as shown in this video, causes the cell walls of bacteria to rupture. 33 seconds

	Salmonella Infection Demonstration Dr. Finlay and another student volunteer illustrate how Salmonella infects a cell, using a marble, plastic wrap, and some yellow gelatin. 1 minute 20 seconds

	Salmonella Video Salmonella are a common bacteria associated with food poisoning. Dr. Finlay shows live Salmonella under the microscope to demonstrate how far and fast they can move. 37 seconds

	Size Analogies of Bacteria and Viruses Dr. Finlay and Dr. Richard Ganem use physical analogies to compare the size of bacteria and viruses relative to a standard mammalian cell. 1 minute 43 seconds

	Transmission of Disease on an Airplane Dr. Finlay, using his student audience, gives a live demonstration of how an antibiotic-resistant strain of tuberculosis managed to spread through the passengers on an airplane. 2 minutes 4 seconds

	Virulence Injection Simulation Using a bagel, a syringe, and blue dye to illustrate how some virulent strains of bacteria inject virulence factors into a cell. 2 minutes

	Interview with Don Ganem An interview with Dr. Ganem. 4 minutes 22 seconds

	Interview with Brett Finlay An interview with Dr. Finlay. 2 minutes 32 seconds

Stem Cells

From the 2006 Holiday Lectures — Potent Biology: Stem Cells, Cloning, and Regeneration
	Planarian Regeneration and Stem Cells A mini-documentary discussing the remarkable regenerative capabilities of the planarian, and how HHMI researcher Alejandro Sánchez Alvarado uses them to study the biology of stem cells. 11 minutes 46 seconds

	Cultured Human Embryonic Stem Cells Cell cultures derived from human embryonic stem cells can reproduce indefinitely and also differentiate into specialized cell types, including beating heart cells. 1 minute 17 seconds

	Somatic Cell Nuclear Transfer Video Somatic cell nuclear transfer (SCNT) is performed looking through a microscope and using small glass pipettes to handle human eggs and to remove and transfer nuclei from one cell to another. SCNT is used to produce clones of cells with the same genetic background as the donor nucleus. 1 minute 59 seconds

	DNA Gene Chip Explanation Dr. Melton describes the process used to extract DNA from a cell and to analyze it on a gene chip. 51 seconds

	Antlers and Mammalian Regeneration Dr. Rosenthal describes how antlers are one of the few examples of complete mammalian regeneration. 2 minutes 18 seconds

	Heart Attack and Blocked Arteries Dr. Rosenthal uses a model of a heart and an artery to describe how blockages lead to heart attack and tissue damage. 51 seconds

	Interview with Douglas Melton An interview with Dr. Melton. 5 minutes 6 seconds

	Interview with Nadia Rosenthal An interview with Dr. Rosenthal. 4 minutes 55 seconds

	Interview with Amy Greenwood and Alice Chen An interview with Amy Greenwood and Alice Chen, two scientists in Dr. Melton's lab. 6 minutes 58 seconds

	Interview with Olivier Mirabeau An interview with Olivier Mirabeau, a scientist in Dr. Rosenthal's lab. 5 minutes 4 seconds

	Interview with Mumna Al Banchaabouchi An interview with Dr Mumna Al Banchaabouchi, researcher in the Mouse Phenotyping Core at EMBL in Monterotondo Italy. 2 minutes 55 seconds

	Interview with Jose Gonzales An interview with Dr. Jose Gonzales, Manager of the Laboratory Animal Resources and Knockout Mouse Facility at EMBL in Monterotondo Italy. 4 minutes 11 seconds

Evolution

From the 2005 Holiday Lectures — Evolution: Constant Change and Common Threads
	Stickleback Fossil Primer A brief introduction to how stickleback fossils are collected and used to study evolution. It also shows the students who attended the 2005 Holiday Lectures taking part in a fossil-collecting activity. 9 minutes

	Breeding Corn from Teosinte Corn was originally bred from the teosinte plant by native Mexican farmers. The morphologies of modern-day corn and teosinte plants are compared to illustrate how artificial selection can bring about dramatic changes in plants. 52 seconds

	Dog Breeding The many forms of dogs that exist today were all created through selective breeding from the dog's ancestor, the wolf. In a span of less than 10,000 years, breeders have changed traits and body shapes of dogs by artificial selection-for example, emphasizing different aspects of hunting and herding behavior. 1 minute 52 seconds

	Fruit Fly Courtship Male courtship dances in two fruit fly species show that the wing spots play a prominent role. 55 seconds

	Galapagos Creatures These are some of the animal species Charles Darwin would have seen when he visited the Galapagos Islands. 24 seconds

	Stickleback Environment At the end of the ice age, the retreating ice sheet created many new lakes, some of which were colonized by sticklebacks. The presence of different predators in different lakes dictated the subsequent evolution of each isolated lake stickleback over the course of about 10,000 years. Some groups kept their spines to use against predatory fish, such as trout. Others lost their spines, perhaps to evade aquatic insect predators. 1 minute 26 seconds

	Fossil Record of Stickleback Evolution A quarry site in Nevada carries the evolutionary history of a population of stickleback fish that resided there when it was a freshwater lake. In a short time span in evolutionary terms—about 10,000 years—the fish population can be seen to dramatically reduce the size of their pelvic spines. This particular fossil record is remarkably complete with nearly year-by-year detail which includes documentation of intermediate forms. 1 minute 26 seconds

	Stickleback Fish on Jeopardy! The identity of the stickleback fish stumps the contestants on the game show. 2 minutes 2 seconds

	Interview with Sean Carroll An interview with Dr. Carroll. 4 minutes 55 seconds

	Interview with David Kingsley An interview with Dr. Kingsley. 4 minutes 41 seconds

	Interview with Stephanie Nuñez An interview with Stephanie Nuñez, an HHMI EXROP student in Dr. Kingsley's lab. 4 minutes 37 seconds

	Interview with Chris Hittinger An interview with Chris Hittinger, a scientist in Dr. Carroll's lab. 4 minutes 45 seconds

Obesity

From the 2004 Holiday Lectures — Science of Fat
	Marathon Mouse Dr. Ronald Evans discusses the so-called "marathon" mouse, with a mutation in the PPAR-gamma gene, and its performance on a treadmill relative to a normal mouse. 52 seconds

	Mouse Activity Dr. Evans compares the activity of a normal mouse to one with a mutation in a key gene controlling obesity. 29 seconds

	Pima Indians A clip about the Pima Indian tribe and how environment has affected them. 2 minutes 35 seconds

	Interview with Dr. Ronald Evans An interview with Dr. Evans. 5 minute 19 seconds

	Interview with Dr. Jeffrey Friedman An interview with Dr. Friedman. 5 minute 32 seconds

	Interview with Grant Barish An interview with Grant Barish, a scientist in Dr. Evans's lab. 5 minutes 50 seconds

	Interview with Shirly Pinto An interview with Shirly Pinto, a scientist in Dr. Friedman's lab. 6 minutes 8 seconds

Cancer

From the 2003 Holiday Lectures — Learning From Patients: The Science of Medicine
	Polyp Removal Dr. Vogelstein shows video taken during a colonoscopy and the removal of a polyp. 36 seconds

	Interview with Dr. Bert Vogelstein An interview with Dr. Vogelstein. 5 minutes 51 seconds

	Interview with Harith Rajagopalan An interview with Harith Rajagopalan, a scientist in Dr. Vogelstein's lab. 4 minutes 50 seconds

Genomics and Chemical Genetics

From the 2002 Holiday Lectures — Scanning Life's Matrix: Genes, Proteins, and Small Molecules
	Diversity-Oriented Synthesis Diversity-oriented synthesis (DOS) is a strategy used by chemical biologists to create a huge diversity of small molecules with potentially useful properties. A scientist working in Dr. Stuart Schreiber's lab shows us how engineering, computer science, chemisty, and biology are all used in DOS. 5 minutes 41 seconds

	Gene Chip Manufacturing Dr. Eric Lander describes the process used to manufacture gene chips. Gene chips, also called DNA microarrays, have a broad range of applications in current research, including enabling researchers to measure the activity of thousands of genes simultaneously. 1 minute 56 seconds

	Microarrayer In Action How a microarraying robot delivers hundreds of small molecules to a series of slides. 1 minute 59 seconds

	Interview with Dr. Stuart Schreiber An interview with Dr. Schreiber. 4 minutes 54 seconds

	Interview with Dr. Eric Lander An interview with Dr. Lander. 5 minutes 30 seconds

	Interview with Angela Koehler An interview with Angela Koehler, a scientist in Dr. Schreiber's lab. 4 minutes 40 seconds

	Interview with Manolis Kamvysselis An interview with Manolis Kamvysselis, a scientist in Dr. Lander's lab. 4 minutes 29 seconds

Sex Determination

From the 2001 Holiday Lectures — The Meaning of Sex: Genes and Gender
	Amoeboid Sperm of C. elegans Video closeup of the C. elegans sperm that moves like an amoeba. 10 seconds

	C. elegans Mating Video microscopy of mating between a male and a hermaphrodite C. elegansroundworm. 56 seconds

	Clonal vs Sexual Reproduction What does a stack of fruits and vegetables have to do with the theoretical advantages of sexual reproduction? Find out in this demonstration with student audience members and Dr. David Page. 8 minutes 55 seconds

	Dosage Compensation in C. elegans A demonstration by Dr. Barbara Meyer of how a branched genetic pathway can be affected by mutations in different parts of the pathway. 8 minutes 55 seconds

	Embryonic Cell Division in C. elegans Time-lapse microscopy showing cell division from 1 to 2 to 4 cell stages in C. elegans with fluorescent chromosomes. 1 minute 30 seconds

	From Fertilization to Egg Laying in C. elegans Video of the fertilization of the C. elegans oocyte, the fusion of the egg and sperm nuclei, and the egg laying. 1 minute 12 seconds

	Intracytoplasmic Sperm Injection (ICSI) Video microscopy demonstrating how sperm from an infertile male can be injected into a female egg. 1 minute 15 seconds

	Regulation of Sex Determination in C. elegans A demonstration by Dr. Meyer showing how a balance of molecular elements trigger genetic pathways that determine the sex of a C. elegans worm. 6 minutes 3 seconds

	Sperm Motility Video microscopy of sperm motility in an average human male and an infertile male. 20 seconds

	Interview with Dr. Barbara Meyer A brief interview with Dr. Meyer. 5 minutes 17 seconds

	Interview with Dr. David Page A brief interview with Dr. Page. 6 minutes 31 seconds

Biological Clocks

From the 2000 Holiday Lectures — Clockwork Genes: Discoveries in Biological Time
	Human Circadian Activity This time-lapse videoclip shows human circadian activity while assembling a T. rex skeleton. 47 seconds

	Mouse Circadian Activity This time-lapse videoclip illustrates a mouse's nocturnal behavior. 41 seconds

	Interview with Dr. Seymour Benzer Are you a night owl or a morning lark? Noted researcher Dr. Seymour Benzer discusses how the difference between he and his wife sparked his interest in the topic of biological clocks. 57 seconds

	Interview with Dr. Ron Konopka Dr. Benzer is joined by Dr. Ron Konopka for a brief discussion of how the per gene is involved in mammalian clocks. 43 seconds

	Interview with Dr. Michael Rosbash A brief interview with Dr. Rosbash. 4 minutes 55 seconds

	Interview with Dr. Joseph Takahashi A brief interview with Dr. Takahashi. 6 minutes 11 seconds

Cardiovascular

From the 1998 Holiday Lectures — Of Hearts and Hypertension: Blazing Genetic Trails
	Echocardiogram Dr. Christine Seidman describes a live demonstration of an echocardiogram, with a description of the parts of the heart that are visualized. 4 min 44 sec

	Kidney Function Dr. Richard Lifton, along with student volunteers, uses an aquarium and salt to illustrate the amount of work the kidney performs each day to maintain proper levels of ions in the body. 4 min 29 sec

RNA

	Enzymes That Are Not Proteins: The Discovery of Ribozymes Listen to HHMI President Dr. Thomas Cech discussing his Nobel Prize–winning discovery of RNA's catalytic properties. Includes animations newly created for the discussion. 19 minutes

	Which Balloon Has Hydrogen? Air is an invisible gas as are hydrogen and helium. How can you tell if a balloon contains hydrogen? Hydrogen has particsular physical and chemical properties that can be tested. Dr. Cech enlists student volunteers to show how a chemical reaction can be used to identify a substance. 5 min 55 sec

	Mr. Lincoln Glows A catalyst is a substance that greatly accelerates a chemical reaction and yet does not directly participate in the reaction and is therefore not consumed. Dr. Cech uses a penny and a beaker of acetone to illustrate how a catalyst works. 5 min 40 sec

	Oxalate Catalysis Without an appropriate catalyst some chemical reactions would be so slow as to appear not to occur at all on the human timescale. However, when catalyzed, these reactions can be very dramatic. Dr. Cech shows a very colorful reaction involving oxalate catalysis. 5 min 54 sec

	On Becoming a Scientist: Dr. Thomas Cech HHMI President Dr. Thomas Cech discusses the path he took to become a scientist and his reaction to receiving the Nobel Prize. 9 min 15 sec

DNA

Watson constructing base pair models

During the process of trying to elucidate the structure of DNA, Jim Watson made some cardboard models to try to understand how DNA nucleotides are paired. It helped him visualize how hydrogen atoms of paired nucleotides interact with each other to form a symmetrical structure that fits the double helix model

1 minute 42 seconds




		Home \| About HHMI \| Press Room \| Employment \| Contact


	© 2009 Howard Hughes Medical Institute. A philanthropy serving society through biomedical research and science education. 4000 Jones Bridge Road Chevy Chase, MD 20815-6789 \| (301) 215-8500 \| e-mail: webmaster@hhmi.org

From the 2008 Holiday Lectures—Making Your Mind: Molecules, Motion, and Memory

From the 2003 Holiday Lectures—Learning From Patients: The Science of Medicine

From the 2007 Holiday Lectures: AIDS: Evolution of an Epidemic

From the 1999 Holiday Lectures: 2000 and Beyond: Confronting the Microbe Menace

From the 2006 Holiday Lectures — Potent Biology: Stem Cells, Cloning, and Regeneration

From the 2005 Holiday Lectures — Evolution: Constant Change and Common Threads

From the 2004 Holiday Lectures — Science of Fat

From the 2003 Holiday Lectures — Learning From Patients: The Science of Medicine

From the 2002 Holiday Lectures — Scanning Life's Matrix: Genes, Proteins, and Small Molecules

From the 2001 Holiday Lectures — The Meaning of Sex: Genes and Gender

From the 2000 Holiday Lectures — Clockwork Genes: Discoveries in Biological Time

From the 1998 Holiday Lectures — Of Hearts and Hypertension: Blazing Genetic Trails