Earth has natural protection - like the kind that help form aurora - but Nasa is hiring its own Nasa is seeking a new "planetary protection officer" tasked with defending the earth from alien life.

That’s what’s great about upcycling: It’s a hands-on way for children to understand that not everything is truly recyclable, and that they can protect the Earth forever by finding new life ...

But what about protecting your home from the cold? The polar vortex is an area of swirling cold air in the Earth's polar regions. During winter, the polar vortex at the North Pole expands ...