episodes – Episode 23

What's making Maine's giant ice disk spin?

A 300-foot ice disk is spinning in a river and scientists aren't sure why. Read More ›

episodes – Episode 22

Can an LED control your nervous system?

A new field called Optogenetics could revolutionize human gene therapy. Read More ›

episodes – Episode 21

Did Leonardo da Vinci have strabismus?

A rare eye condition may have helped the genius with painting. Read More ›

episodes – Episode 20

How often did humans breed with Neanderthals?

Our ancestors did the cross-species deed, and it's in your DNA. Read More ›

episodes – Episode 19

Does negative mass explain dark matter?

95% of the universe is "dark matter," but what is that exactly? Read More ›