A baby Hoffman’s two-toed sloth lies in a basket during rehabilitation at the Jaguar Rescue Center in Costa Rica. Annie Marie Musselman Nursing a helpless baby sloth, which weighs only 10 or 11 ...

Turns out that baby humans aren’t the equivalent of a cute blob of goldfish. Using brain scans of awake infants, researchers have found that the hippocampus — a seahorse-shaped region of the ...