Weather & Climate

Polar vortex: It's baaaaack!

These electric-blue night clouds are expanding around the globe, says NASA

10 not-too-cold wintertime destinations

Why is this beach covered in giant snowballs?

8 of the coldest places in the world to live

Bizarre clouds over Bermuda Triangle may finally solve longtime mystery

10 places to appreciate before they vanish

What do you know about fall?

Eagle rescued from car grille after hurricane

Yes, a Hurricane Matthew 'loop' is possible

What are the different types of lightning?

What are lightning sprites?