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...
Dr. Michael Gottlieb was the first physician to notice the new disease of AIDS.
Dr. Kandel illustrates the practice of the now-debunked theory of phrenology.
Continents rose in elevation after ice sheets from the last ice age retreated. This suggested that the underlying mantle is pliable.
The concept that continents float on a pliable mantle is an important element of the theory of continental drift.