When the finely tuned balance among the different parts of bodies breaks down, the individual creature can die. A cancerous tumor, for example, is bo….

We were staring at the origin of a piece of our own bodies inside this 375-million-year-old fish. We had a fish with a wrist..

Each galaxy, star, or person is the temporary owner of particles that have passed through the births and deaths of entities across vast reaches of ti….

Take the entire 4.5-billion-year history of the earth and scale it down to a single year, with January 1 being the origin of the earth and midnight o….

We were not designed rationally, but are products of a convoluted history..

With respect to the ZPA, what kind of digit develops depends on how close the digit is to the source of Sonic hedgehog..

We would never have scales, feathers, or breasts if we didn't have teeth in the first place..