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.

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

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

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

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

Curtis A. Suttle, PhD

Even kids as young as four want to punish freeloaders

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

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

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

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

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