The Most Vexing Variable in the Search for E.T.

This is the last of three blog posts associated with this week’s episode of Cosmos: A Spacetime Odyssey, which addresses life in the universe. Read the first and second here. Someday, in the not too ...
The Brighterside of News on MSN

Could reflecting sunlight back to space actually work and cool the planet?

Scientists for years have argued over drastic action to cool a warming world. Among the most widely debated is stratospheric aerosol injection, or SAI— injecting reflective particles into the upper ...