Amazing Aerogel: Strong as Steel, Light as Air

One of the world's most amazing materials wasn't created by nature - it was invented by a couple of scientists who made a silly bet. In 1931, Samuel Stephens Kistler and Charles Learned wanted to ...

Watch Out: 15 Eerie Abandoned Observatories

The outlook on (or from) abandoned observatories remains negative, mainly because there's no one there to look up and no working optics to see through. Casualties of war, funding, politics and ...