Date: 09.28.2012

sars-like virus has bat origins

Genomic sequencing  of a SARS-like virus suggests retlation to a virus that is known to infect bats. From NPR news:

Dutch virologists have just published the whole genome of the new coronavirus — all 30,118 letters of its code. And, the sequence reveals that the mystery virus is most closely related to coronaviruses that infect bats in Southeast Asia.

In fact, the pathogen is more similar to two bat viruses than it is to the human SARS virus that sent the world into a panic when it infected nearly 8,000 people in 2003.

Virologist Ron Fouchier, who has done controversial work on bird flu viruses, led the sequencing effort of the SARS-like virus. He tells Shots the results suggest that the new coronavirus virus came from bats. “Bats harbor many coronaviruses, so it’s logical to assume that bats are the natural reservoir” of the new pathogen, he says.

“But this doesn’t mean the Saudi man contracted the virus from bats,” says Fouchier.

When viruses jump from animals to humans, there’s usually a second animal that connects the natural carrier with humans. This species is called the amplifier because it increases the number of viral particles that can hop over into people.

links

Here’s some interesting science linkage for you:

After pregnancy, women have male DNA fragments in their brains. [Popular Science]

How do we know humans are getting smarter? [Scientific Americana book excerpt]

Cool science images. [Popular Science]

How oblate is the sun? [Science, subscription required; summary available]

Obvious gender bias found in scientific disciplines. [Science, subscription required; summary available]

 

Enjoy!

curiosity finds signs of ancient stream

on MARS!

Martian rocks resemble rocks in a streambed from Earth.

Curiosity has taken pictures that suggest that there was once a fast moving stream of water on the planet Mars. Photos of rocks on the planet’s surface are surprisingly similar to rock formations formed in ancient streambeds here on Earth. From Associated Press:

The NASA rover Curiosity has beamed back pictures of bedrock that suggest a fast-moving stream, possibly waist-deep, once flowed on Mars — a find that the mission’s chief scientist called exciting.

There have been previous signs that water existed on the red planet long ago, but the images released Thursday showing pebbles rounded off, likely by water, offered the most convincing evidence so far of an ancient streambed.

There was “a vigorous flow on the surface of Mars,” said chief scientist John Grotzinger of the California Institute of Technology. “We’re really excited about this.”

The discovery did not come as a complete surprise. NASA decided to plunk Curiosity down inside Gale Crater near the Martian equator because photos from space hinted that the spot possessed a watery past. The six-wheeled rover safely landed Aug. 5 after a nail-biting plunge through the Martian atmosphere. It’s on a two-year, $2.5 billion mission to study whether the Martian environment could have been favorable for microbial life.

Martian rock formations near Curiosity’s landing site are thought to have been molded by an ancient fast moving stream of water.

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