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Sleep Clears β-amyloid from the Brain
Data Point

The researchers in this study tested whether the rate of Aβ removal is higher during sleep using mice as model organisms.
Dragon Tale
Image of the Week

A pangolin rescued from poachers near Gorongosa National Park, Mozambique.
Modeling Trophic Cascades
Activity

Students use cards of animal and plant species to model trophic cascades. Species examples are drawn from seven different habitats to test student understanding.
Single Mother
Image of the Week

A queen bee may produce as many as 60,000 offspring during her lifetime.
Trophic Cascades in Salt Marsh Ecosystems
Scientists at Work

(10 min 1 sec) Ecologist Brian Silliman uses manipulative field experiments to reveal that salt marsh ecosystems are under top down control from consumers and predators.
Larval Biscuit
Image of the Week

A pluteus larva of the sea biscuit, Clypeaster subdepressus, an echinoderm closely related to sea urchins.
Riverine Food Webs – How Flow Rates Affect Biomass
Scientists at Work

(9 min 15 sec) Ecologist Mary Power studies the Eel River in Northern California to figure out the connection between river flows and biodiversity.
Patterns in the Distribution of Lactase Persistence
Activity

Students explore the geographic distribution of lactase persistence around the world by analyzing real data collected by scientists.
Mimicry in a Diverse Community of Arthropods
Data Point

Researchers exposed arthropod mimics that use a golden patch to warn of unpalatability to predators with different prey preferences to determine how effective their warnings were.
Who Am I?
Image of the Week

The caterpillar of the spicebush swallowtail butterfly (Papilio trollus) mimics the rough green snake (Opheodrys aestivus).
Super Stoma
Image of the Week

The stomata of grasses (singular stoma) function more efficiently than those of other plants.
Ecology, Food Webs, and the Chesapeake Bay
Lecture

(49 min 3 sec) A discussion of the Chesapeake Bay Watershed, its complex food web, and the challenges of conserving and restoring the bay.
Snail Fronts and Salt Marsh Die-Offs
Data Point

Researchers studied whether periwinkle snail fronts expand mudflats and contribute to salt marsh die-offs.
Lionfish Invasion
Image of the Week

Two species of lionfish, the red lionfish (Pterois volitans) and the common lionfish (Pterois miles), have been established as invasive species off the East Coast of the United States and in the Caribbean.
Wash Your Hands
Image of the Week

As few as eighteen of these norovirus particles are sufficient to infect one person.
Red Tattoo
Image of the Week

A section of stained human skin bearing a red tattoo.
Tracking Global Changes in Forest Cover
Data Point

Researchers used satellite imagery analyze the amount of forest that was lost annually across the globe between 2000 and 2012.
Spiny Cells
Image of the Week

A drawing, made by Santiago Ramón y Cajal of pyramidal neurons in the cerebral cortex of a rabbit, documented the presence of dendritic spines on the surfaces of some of the cells.
Studying Elephant Communication
Scientists at Work

(6 min 43 sec) Elephants can communicate over long distances using low-frequency sounds that travel both in the air and through the ground. Scientists are studying whether elephants can “hear” and interpret these ground vibrations.
Tugging The Cellular Heartstrings
Image of the Week

The microtubules inside cardiomyocytes buckle when the heart contracts.