
How to Calculate a Bigger Slice of Pi
For thousands of years people have struggled to pin down pi. Watch how mathematicians from Archimedes on have wrapped their heads around the math of circles.

How to Calculate a Bigger Slice of Pi
For thousands of years people have struggled to pin down pi. Watch how mathematicians from Archimedes on have wrapped their heads around the math of circles.

An Olympic Showdown: Human versus Ant
Could the fungus-farming leaf-cutter ant take on an Olympic weightlifter?

An Olympic Showdown: Human versus Bat
Could the tiny vampire bat give Olympic sprinters in Rio a run for their money?

An Olympic Showdown: Human versus Dolphin
Can a hot pink dolphin outswim an Olympic champion?

What Makes Spiders Scary
Scientists hope to learn whether arachnophobes' perception of spiders as larger than actual size causes their fear—or whether it is the fearfulness itself that causes their visual misperception.