Archive: 08/09/2006

Lake Tahoe Clarity Holds Steady in 2005

The waters of Lake Tahoe were clear to an average depth of 72.4 feet in 2005, according to UC Davis scientists who have monitored the lake since 1968. That keeps the clarity measurement in the range where it ...

Aug 09, 2006 2.3 / 5 (3) 0

Study breaks ice on ancient arctic thaw

A new analysis of ocean-floor sediments collected near the North Pole finds that the Arctic was extremely warm, unusually wet and ice-free the last time massive amounts of greenhouse gases were released into the Earth's atmosphere ...

Aug 09, 2006 3.9 / 5 (28) 0

Evolution of a penis worm

The detailed images of embryos more than 500 million years old have been revealed by an international team of scientists, led by the University of Bristol. Writing in the journal Nature, Dr Phil Donoghue and ...

Aug 09, 2006 3.2 / 5 (14) 0

Invasive Species Alter Habitat to Their Benefit

When scientists study habitats that alien species have invaded, they usually find predictable patterns. The diversity of native species declines, and changes occur in natural processes such as nutrient cycling, wildfire frequency ...

Aug 09, 2006 4 / 5 (2) 0