Eggs are tiny wonders, but even wonders can go wonky sometimes. We look at everything from double-yolkers to eggs with no shell at all.
Why are some animals resistant to waterborne disease? A reader wants to know.
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.
Why is it the flu virus is so deadly compared to the common cold virus?
Reader Adam Barclay, 44, wants to know if someone his age has any chance of living forever.
A special combination of rain, rocks and subsea volcanoes makes the sea salty.
Plants produce toxic fruit for everything from deterring fungi to causing constipation.
Have you ever heard chicks peeping in the egg? Have you ever wondered how they manage to take their first breath in the shell?