A professor at Hunter College has built one of the largest special collections of contraband Russian literature in the world.

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Credit: Samantha Mangino / ...

Gastrulation is the process during which the early sphere-like embryo of most animals is dramatically re-organised by the inward migration of cells on the outside of the embryo. During gastrulation, ...