出生美麗

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Mon, 17 Jun 2013 12:33:25 -0500

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Mon, 17 Jun 2013 11:49:20 -0500

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Sun, 16 Jun 2013 20:59:41 -0500

theanimalblog: A rare orange leaf-monkey baby was born in...

Sun, 16 Jun 2013 20:58:29 -0500

theanimalblog:

A rare orange leaf-monkey baby was born in Sydney’s famous Taronga Zoo.

The Silence of the Lambs

Sat, 15 Jun 2013 11:03:16 -0500

The Silence of the Lambs

stellar-indulgence: Early Earth Turned Methane Haze On and...

Fri, 14 Jun 2013 15:39:47 -0500

stellar-indulgence:

Early Earth Turned Methane Haze On and Off?

Saturn‘s moon Titan is unique in our solar system, being the only natural satellite to boast a significant atmosphere, somewhat like Earth’s.

Also like Earth, Titan has bodies of liquid on its surface that support processes akin to our water cycle—the huge moon has clouds, spring rains, and fog—and even shows signs of a lake effect similar to the one seen over North America’s Great Lakes.

The key difference, of course, is that the liquid on chilly Titan is methane, a carbon-based chemical that, on our world, is the prime component in natural gas.

Still, Titan’s hydrocarbon haze is exciting to scientists who are hoping to get a glimpse of how life might have been sparked on Earth: Lab experiments, for example, suggest that the moon’s atmosphere may be flush with the building blocks of life, such as amino acids and DNA bases.

And now, for the first time, scientists say they have proof that early Earth had a very Titan-like atmosphere … at least periodically.

On today’s Earth, dry air contains roughly 78% nitrogen and 21% oxygen, with trace amounts of other gases. But ancient rocks show that, before about 2.5 billion years ago, atmospheric oxygen was a scarce commodity on our planet.

The widely held theory has been that before the so-called Great Oxygenation Event, Earth’s atmosphere was dominated by Titan-esque organics—but no one had yet found evidence for such a chemical makeup in the planet’s rocky history.

Core samples from these rocks contain microbial mats, which show that some of the tiny creatures in shallow seas were producing oxygen long before the Great Oxygenation of our atmosphere.

The rocks also contain carbon and sulfur isotopes—chemicals that would have reacted with oxygen. The levels of the different kinds of isotopes present indicate that sometimes oxygen production was happening when the atmosphere was thick with methane—but other times the atmosphere must have been haze-free.

The clarity of the early atmosphere seems to flip flop roughly every few million years, Zerkle and co. report, hinting at a push and pull between microbes that generated oxygen and those that belched methane.

At last, though, *something* happened about 2.5 billion years ago to trigger the planet’s permanent oxygen high. (What that “something” was is still a mystery, although theories abound.)

Of course, this pattern has so far been seen only in the South African rocks, so more research on samples from around the world will be needed to truly tell whether Earth was once a Titan—atmospherically speaking.

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Fri, 14 Jun 2013 15:38:49 -0500

theanimalblog: Hey Mourinho, I’m the Special One! Photo by John...

Fri, 14 Jun 2013 15:30:49 -0500

theanimalblog:

Hey Mourinho, I’m the Special One! Photo by John “Flick” Purchase

Mika Nakashima/声(Koe)

Fri, 14 Jun 2013 02:44:07 -0500

Mika Nakashima/声(Koe)

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Thu, 13 Jun 2013 10:19:55 -0500

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Wed, 12 Jun 2013 22:11:15 -0500

jinyongkim: Juhyeon Lee 11 JUNE, 2013 www.thepeoplepurple.com

Wed, 12 Jun 2013 10:59:00 -0500

jinyongkim:

Juhyeon Lee

11 JUNE, 2013

www.thepeoplepurple.com

Goldfrapp ‘Tales Of Us’ Trailer (by GoldfrappTV)

Tue, 11 Jun 2013 18:15:50 -0500

Goldfrapp ‘Tales Of Us’ Trailer (by GoldfrappTV)

drawingsofgirlson: A girl doing the peace sign and her friend.

Tue, 11 Jun 2013 15:28:39 -0500

drawingsofgirlson:

A girl doing the peace sign and her friend.

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Tue, 11 Jun 2013 13:33:00 -0500

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Tue, 11 Jun 2013 13:30:16 -0500

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Mon, 10 Jun 2013 18:19:49 -0500

Art History Meme » 2/9 Paintings Oriental Poppies...

Sun, 09 Jun 2013 15:37:50 -0500

Art History Meme » 2/9 Paintings

Oriental Poppies (1928)

Georgia O’Keeffe

Georgia O’Keeffe believed that due to the fast-paced lives people live, they merely glance at flowers, but never really observed their exquisiteness. She wished to give such rushing people experience and the feel of the true beauty of flowers. In her words,

”If I could paint the flower exactly as I see it no one would see what I see because I would paint it small like the flower is small. So I said to myself - I’ll paint what I see - what the flower is to me but I’ll paint it big and they will be surprised into taking time to look at it - I will make even busy New Yorkers take time to see what I see of flowers.”

O’Keeffe chose to paint on a huge canvas with an outburst of bold colors, to astonish the viewers and to introduce them to the wonder of nature. In her bid, she managed to capture the essence of poppies with eloquence. (x)

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Sun, 09 Jun 2013 12:20:42 -0500

theanimalblog: Marmoset and Green Iguana. Photo by floridapfe

Sun, 09 Jun 2013 12:18:55 -0500

theanimalblog:

Marmoset and Green Iguana. Photo by floridapfe