429 results
429 results for: grassland
- Ecosystems
U.S. bird populations in decline, report says
Secretary of the Interior Ken Salazar releases a review of U.S. bird populations.
- Anthropology
Contested evidence pushes Ardi out of the woods
A controversial new investigation suggests that the ancient hominid lived on savannas, not in forests.
- Humans
Ancient shoe steps out of cave and into limelight
Excavations in an Armenian cave have uncovered the oldest known leather footwear, a 5,500-year-old shoe.
- Animals
Climate change may favor couch-potato elk
With drought and rising temperatures in Wyoming, migratory animals suffer while stay-at-home members of the same herd thrive
-
- Ecosystems
Going Native: Diverse grassland plants edge out crops as biofuel
Biofuels made from mixtures of plants native to prairies can yield more net energy than do biofuels derived from corn and soybeans.
- Earth
Freeze-thaw cycles: How not to mix soil
The repeated cycles of ground freezing and thawing that occur in many places don't do a surprising poor job of churning the soil.
-
-
-
-
-
