Archive for August, 2007

Head Trauma Contributed to Iceman’s Demise

Publication: National Geographic News   Date: August 31, 2007   View Article

Severe head trauma added to the lethal arrowhead wound in the shoulder that killed the prehistoric iceman known as Oetzi, a new analysis reveals.

The new finding builds on research published in June that showed the 46-year-old man found in Italy likely bled to death 5,300 years ago from an arrow-inflicted laceration to an artery just below his collarbone.

Supersonic “Hail” Seeds Star Systems With Water

Publication: National Geographic News   Date: August 29, 2007   View Article

Evidence of water vapor “raining down” on a newly forming star system is offering the first direct look at how water likely gets incorporated into planets, NASA researchers announced.

The water—enough to fill Earth’s oceans five times over—falls at supersonic speeds in the form of a hail-like substance from the envelope of dust and gas that gave birth to the star.

T. Rex Quicker Than Fastest Humans, Study Says

Publication: National Geographic News   Date: August 23, 2007   View Article

Today’s top athletes would be no contest for meat-eating dinosaurs that ran on two feet, according to new computer simulations of how the extinct predators moved.

Even a six-ton Tyrannosaurus rex, long considered a lumbering beast, could reach a top speed of 18 miles an hour (29 kilometers an hour), according to the simulations.

Rare Japanese Dugong Threatened by U.S. Military Base

Publication: National Geographic News   Date: August 23, 2007   View Article

The rare Okinawa dugong has been classified as “critically endangered” on Japan’s Ministry of the Environment Red List, the Japanese equivalent to the U.S. government’s endangered species list, officials announced this month.

“Cosmic Train Wreck” May Derail Theories of Dark Matter

Publication: National Geographic News   Date: August 22, 2007   View Article

New observations of a massive intergalactic collision are raising more questions about the mysterious nature of dark matter.

The study looked at three huge galaxy clusters that are merging into an even bigger cluster called Abell 520, located about three billion light-years from Earth.

Arctic Ice at All-Time Low

Publication: National Geographic News   Date: August 20, 2007   View Article

There is less sea ice in the Arctic than ever before recorded, thanks in part to a warm, sunny summer, a climate scientist said today. And the melting season isn’t even over.

On Sunday the sea ice extent was measured at 1.93 million square miles (5.01 million square kilometers).

Odd Star Sheds Cometlike Tail

Publication: National Geographic News   Date: August 15, 2007   View Article

The star Mira sheds a cometlike tail of rich material as it streaks through space—something that has never been seen before—astronomers announced today.

Acting sort of like a cosmic Johnny Appleseed, the star is leaving behind carbon, nitrogen, oxygen, and other important “seed” elements needed for new stars, planets, and potential life to form.

© 2008-2010 Collected Writings By John Roach