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How A Texas Town Became Water Smart

San Antonio dramatically cut consumption and invested in water recycling and desalination projects. The city still uses about the same amount of water it did in the early '90s even though it has added more than 300,000 residents. It now bills itself as "Water's Most Resourceful City."

Paleontologists Unearth Possible Pre-Human Fossils

Fossils discovered in East Africa suggest that Homo erectus, the species believed to be humans' direct ancestor, may have shared Earth with two genetically distinct but similar species. Some paleontologists believe that these species may be distant relatives to modern humans, while others need more evidence.

Healing The Bay In Santa Monica, Calif.

Every third Saturday hundreds of volunteers show up at designated beaches with buckets in hand prepared to pick up trash.

Building For Birds: Architects Aim For Safer Skies

The eye-catching, shiny buildings that line cityscapes can be deadly for birds. Architects are experimenting with new designs that preserve the beauty – while also preserving the birds.

Here's Where Farms Are Sucking The Planet Dry

Farmers are emptying some of the world's most important aquifers faster than rainfall can replenish them, which means less water for everyone. This map from the journal Nature shows where irrigation is doing the most damage.

How Hot Was It? July Was Warmest Month On Record For U.S.

There's never been a hotter month in records going back to 1895. The average temperature across the lower 48 states was 77.6 degrees.