Greg Walters

Latest articles by Greg Walters

A NASA camera on the Deep Space Climate Observatory satellite captured its first view of the entire sunlit side of the spherical planet Earth, on July 6, 2015.

Geoengineering the Climate Could Cause Devastating African Droughts

By Greg Walters published

Earth
US Army Spc. Angel Mendoza

'Space Aggressors' Train US Forces for Extraterrestrial Conflict

By Greg Walters published

Elite military units are specializing in mock space warfare, as Russia and China develop anti-satellite weaponry.

Tech
Shackleton crater on the moon

This Company Plans to Mine the Moon — and It's Not Alone

By Greg Walters published

Florida-based Moon Express is among several private companies gearing up to harvest resources from the moon and asteroids.

The moon
earth

Harvard Researchers Are Preparing to Geoengineer the Atmosphere

By Greg Walters published

In a first-of-its-kind study, scientists will disperse aerosols into the stratosphere in initial tests of a controversial technique for blocking incoming solar radiation.

Earth