The Chemistry Behind the Different Colors of Autumn Leaves

At some point when you were a wee child, your parents or teachers probably gave you a simple—but incomplete—explanation of why leaves change color in the fall: green chlorophyll fades to reveal the yellows and oranges that have been there all along. That's true, but that's not the whole chemical story. » 9/18/14 2:25pm 9/18/14 2:25pm

The CIA Watched bin Laden For Months From Right Down the Block

In a safehouse in Abbottabad, Pakistan, a small team of CIA spies lived and worked for months. Their mission: collect information on a nearby compound suspected of housing the world's most notorious terrorist. » 5/06/11 10:31am 5/06/11 10:31am

The Most Magnetic Material Yet

Iron cobalt was the most magnetic material on Earth until physicists created what's in this man's hands. It's an iron and nitrogen compound which is 18 percent more magnetic and potentially disproves theories about how magnetic a material can be. » 4/06/10 6:20pm 4/06/10 6:20pm