How an unusual little snail jumped its way across the globe

The mystery of cave-dwelling opossum shrimp found half a world apart

From bats living paycheck-to-paycheck to elephant seal billionaires — which species can afford to act sick, which cannot, and why?

“I was now in hopes that I had made the little orphan quite happy; and so it seemed for some time, until it began to remember its lost parent…” — Alfred Russel Wallace, The Malay Archipelago (1869)