08/09/2011

How hummingbirds produce fluttering sounds during courtship

Though famous for their mid-air hovering during hunting, tiny hummingbirds have another trait that is literally telltale: males of some hummingbird species generate loud sounds with their tail feathers while courting females. ...

800,000 years of Greenland's abrupt climate variability

An international team of scientists, led by Dr Stephen Barker of Cardiff University, has produced a prediction of what climate records from Greenland might look like over the last 800,000 years.

Hog waste producing electricity and carbon offsets

A pilot waste-to-energy system constructed by Duke University and Duke Energy this week garnered the endorsement of Google Inc., which invests in high-quality carbon offsets from across the nation to fulfill its own carbon ...

Humans naturally cooperative, altruistic, social

The condition of man is a condition of war, wrote 17th-century philosopher Thomas Hobbes. A quick glance through history books and today's news headlines certainly seems to support the longstanding idea that humans by nature ...

page 3 from 10