Scientists argue loss of plant and animal diversity spells trouble for planet
Mysterious disease is wiping out hives in the US
The empire, larger than its contemporaries Egypt and Mesopotamia combined, once held 10 percent of world’s population
Nonprofit works with homeless youth in the nation’s capital
List puts focus on threats to biodiversity around the planet
Active learning replaces traditional lectures
Colorful wall paintings provide new insights into how Mayan astronomers charted the cosmos
More Likely to engage in unhealthy behaviors to alleviate stress
Water heating ice shelf from below
Initiative aims to eliminate deaths from measles, rubella
Pollution, overfishing destroy 20 percent of world’s reefs
Ancient Amazon farmers shunned slash-and-burn techniques
CO2 also plays role in today's warming
Documentary chronicles aftermath of earthquake and tsunami
Over last half-century, global warming has led to changes in climate extremes
James Cameron travels 11 kilometers below surface
Filmmaker James Cameron repeats record-setting voyage
Study confirms humans, great apes separated from common ancestor
Students explore new frontiers in science, technology, engineering and math
But China is still building a number of new reactors
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