Pesticide companies used to sell concoctions of poison mixed with sugar in attempts to control cockroaches. The sugar would attract the insects and the poison would kill them. At least, that was the initial idea.

Charles Darwin bred many varieties of pigeons. Some had differently shaped head crests and others had unique color patterns in their plumage. Darwin tried to use these superficial examples of human-guided animal breeding to support his false idea that nature repeatedly transformed one basic life-form into another.

Panda bears are restricted to remote mountains in China and have similar-sized bodies today. But fossils show that in years past some were mini-pandas, while others were giants. Plus, they lived in places far-flung from China. A new find described a mini-panda fossil fragment from Spain, reviving questions about the origin, migration, and demise of panda bears through history.