life's little mysteries

There are plenty of harmful chemicals, but the devil is in the details when determining which is the most dangerous.

The oldest known sandals are from Oregon, but there may be older shoes out there.

The diversity of even the largest animals depends on the smallest factors.

Clothes don't survive the way artifacts made of stone, bone and other hard materials do, so scientists have to get creative to answer this question.

The science of ruining your favorite shirt is more complicated than you might think.

Some humans have always stood head and shoulders above their peers, but there's nothing mythological about these real-life human giants.

If dinosaurs were reptiles, then why aren't birds cold blooded?

Gum is full of non-food items, like resins, emulsifiers and softeners. So what happens when we swallow a piece?

Earth's day used to be five hours shorter, and it's predicted to continue lengthening over time.

People who sneeze in bright lights, like the sun, may have autosomal dominant compelling helio-ophthalmic outburst syndrome, or ACHOO.