"Tiny Frogs Reveal Big Secrets of Plate Tectonics"
Earth News, Discovery News (August 7, 2010)
"Around 55 million years ago, India and China collided. Some time after that -- geologists disagree on exactly when this happened -- the Himalayan-Tibetan plateau rose skyward, creating the rugged landscape that today attracts tourists and mountain climbers from all over the world.
"Now a new study has constructed the evolution of various frog species found across eastern Asia, giving geologists a genetic clock by which they can time the upheaval of the region known as 'the roof of the world.'
"In a new article in the journal Proceedings of the National Academy of Sciences, researchers led by David Wake of the University of California, Berkley detailed how four different waves of divergence among frog species -- the point when new species are created from a common ancestor -- can be explained by four major tectonic events in the region...."
There were a few surprises here. First, the scientists found that what they'd figured was one species of frog weren't: They looked alike because they'd adapted to the same environment. Mountain streams, in this case.
(I've posted about critters that live closer to sea level adapting over the weekend. (August 8, 2010))
Another surprise was that, after they'd finished analyzing and plotting their data, they found that the smooth, gradual uplift of the Himalayas - probably wasn't. Apparently it's easier to fit the data about what was happening with the mountains to what was happening with the frogs, if you assume that the mountains went up by fits and starts.
That runs contrary to the conventional idea that the Himalayas were pushed up gradually.
This could either result in a very close examination of the frog research and geological data collected to date - or in the heretic scientists being fired. That's happened before, when someone came up with the 'wrong' answer.
I'm inclined to take the frog data seriously; partly since it's not calculated to win automatic acceptance by going along with the flow; partly since the numbers show when the periods of rapid uplift happened.
Also, because abrupt changes do happen. Like the city in Chile that was 10 miles farther west in March, than it had been in January of this year. (March 10, 2010)
More in this blog:
Subscribe to:
Post Comments (Atom)
Unique, innovative candles
Visit us online: | |
Spiral Light Candle | • Find a Retailer • Spiral Light Candle online store |
Top 10 Most-Viewed Posts
-
(from INKCINCT Cartoons, used w/o permission) I very seldom copy an entire post in this blog, but trying to describe this cartoon would have...
-
" Coconut crab " AbsoluteAstronomy.com " The coconut crab, Birgus latro, is the largest land-living arthropod in the world an...
-
Ploak.com Article Directory " Your one-stop source for free articles. Do you need contents to add to your web site? Or articles for use...
-
" How to Think Like an Interior Designer " Jaime Derringer, via Shelpterpop (July 29, 2010) " It takes a unique mind to perfe...
-
Before anything else, repeating from an earlier post: Google has launched a 'people finder' for Japan, in Japanese, English, Korea...
-
Update (October 11, 2010) Another article about Reaction Engines Ltd.'s Skylon: " Airplanes in Space? " Irene Klotz, Space ...
-
" Stan Lee Unveils 3 New Superheroes at Comic-Con " Underwire, Wired (July 22, 2010) " A time traveler, an unwitting heir to ...
-
" Hellgrammite (Dobsonfly Larvae) (Corydalus cornutus) " Texas Parks and Wildlife " Other Names " Eastern Dobsonfly ...
-
" 'Lost City' of Tanis Found, but Often Forgotten " Brian Handwerk, Mysteries of the Ancient World, National Geographic (...
-
Whether you call it trafficking in persons, human trafficking, or slavery, buying and selling people isn't nice. And, in quite a few cou...
Today's News! Some of it, anyway
Actually, some of yesterday's news may be here. Or maybe last week's.
The software and science stuff might still be interesting, though. Or not.
The Lemming thinks it's interesting: Your experience may vary.
The software and science stuff might still be interesting, though. Or not.
The Lemming thinks it's interesting: Your experience may vary.
("Following" list moved here, after Blogger changed formats)
No comments:
Post a Comment