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.

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

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

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

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

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

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

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

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