Lasers reveal ancient urban sprawl hidden in the Amazon
South America’s Casarabe culture built a network of large and small settlements in what’s now Bolivia centuries before the Spanish arrived.
South America’s Casarabe culture built a network of large and small settlements in what’s now Bolivia centuries before the Spanish arrived.
An 18th century math theory may offer new ways to understand schizophrenia, autism, anxiety and depression.
In the 10 years since "An Inconvenient Truth" was released, climate researchers have made great progress in predicting how rising temperatures will affect sea level, weather patterns and polar ice.