Billions of viruses are raining down on you from the upper atmosphere every day

The next time you go outside and take a deep breath of fresh air, think about this: as you stare up into the sky, billions of tiny invisible viruses are raining down on you.

Lab grown lungs are transplanted in pigs today, they may help humans tomorrow

TESS, the planet hunting space telescope, is on track to discover a sky full of exoplanets

Even kids as young as four want to punish freeloaders

The year in climate change: Fires and heat-waves show things are heating up

We've been cloud seeding for decades, but now we finally know it works

TESS, the planet hunting space telescope, is on track to discover a sky full of exoplanets

A lake of water was found on Mars — and may be the first of many

Billions of viruses are raining down on you from the upper atmosphere every day

Dec. 29, 2018 — Water on Mars, lab-grown lungs and more: The biggest science stories of 2018

Dec. 29, 2018 — Water on Mars, lab-grown lungs and more: The biggest science stories of 2018

A lake of water was found on Mars — and may be the first of many

Dec. 29, 2018 — Water on Mars, lab-grown lungs and more: The biggest science stories of 2018

The year in climate change: Fires and heat-waves show things are heating up

We've been cloud seeding for decades, but now we finally know it works