Waluh, a one-day-old male baby pygmy hippopotamus (Cheropsis libereensis), swims with his mother.
Why are some animals resistant to waterborne disease? A reader wants to know.
Southpaws seem to be more common among cats and dogs than humans.
The animal kingdom is full of lefties and righties, although rarely is the ratio skewed as much as it is in humans. If you're wondering about your own pet, you can find out with a simple experiment.
Flu seems to be more deadly than colds, here’s why.
Why is it the flu virus is so deadly compared to the common cold virus?
How likely is it that someone alive today may live for centuries?
Reader Adam Barclay, 44, wants to know if someone his age has any chance of living forever.
Salt flows down rivers to the ocean.
A special combination of rain, rocks and subsea volcanoes makes the sea salty.
It was all the apple’s fault: we’ve been fascinated by poisoned fruit for a long time.
Jacob Jordaens (1593–1678), The Fall of Man, via Wikimedia Commons
Plants produce toxic fruit for everything from deterring fungi to causing constipation.
A quail chick hatching.
Have you ever heard chicks peeping in the egg? Have you ever wondered how they manage to take their first breath in the shell?