Wallace called "flying" frogs "very interesting to Darwinians." They showed how webbed feet for swimming had been adapted for gliding.
Meaghan Davison, London, Ontario - The morning after a rainy night, Meaghan Davison, 18, wandered through her uncle's garden and noticed this bent-over poppy. "I was curious to see what it looked like from underneath," she says, "so I took a picture." (picture from you shot)
DEAD SEA SHORE - Boulders spiky with salt crystals edge mineral-rich water where herod's physician set him to bathe. Nearly 70 years old, the king was feverish, itchy, and wracked with pain. The therapy failed, and Herod, despondent and increasingly paranoid, tried to kill himself.
April 1999. With water-ice clouds drifting over ancient volcanoes, the red planet spins more than 50 million miles from Earth.
Herod the great's three-tiered palace cascades down the north face of Masada, the work of a king long reviled as a villain but today recognized as a master architect. With Roman techniques and unique ambition, he created audacious masterpieces of stunning beauty.
West of the line, in Sumatra, Wallace saw a species of dead-leaf butterfly whose closest relatives are African and Asian.
South Africa Green tree pythons coil when comfortable. Though this snake is a pet in Pretoria, the species is native to northern Australia and New Guinea. In the wild its coloration lends cover for a life spent mostly in trees.
Crater Lake's 1,943-foot depths were created following volcanic eruptions 7,700 years ago; a lava outcrop juts from the northwest rim of the caldera. Snowmelt from the surrounding Cascade Mountains percolates through the land to the south, emerging as springs that feed streams flowing into Upper Klamath Lake.
A relatively young impact crater-less than a million years old-offers a mile-wide peek under mars's skin. Adding color to images from the Mars Reconnaissance Orbiter (MRO) helps geologists separate rock (more blue) from dust. "The orbiter puts a spy camera above Mars," says Alfred McEwen, and MRO mission lead scientist. "Our data are increasing exponentially." - NASA/JPL/University of Arizona
(This picture is used as an Icon in the article about Herod. The size of the picture on paper is about a square inch)
The tiger is an Asian species that reached Sumatra, Java, and Bali. The Sumatran subspecies still survives in the wild, tenuously, and in zoos.
Greenland An iceberg reveals a glimpse of the southern Green land town of Narsaq. A nearby glacier births a steady supply of bergs that jostle off the settlement's shores year-round.
In a holding pattern, spring chinook salmon congregate in the depths of a pool on the Salmon River. In early fall, they'll head farther up the Klamath tributary to spawn. Spring runs of chinook salmon in the Klamath numbered as high as 800,000 in the early 20th century but have fallen dramatically in recent years.
Bright in this false-color image, deposits of water ice, alternating with bands of dark sand, stairstep from the top of a scarp (far left) into a 2,000-foot-deep canyon. The layers likely accumulated over millions of years during periods similar to ice ages on Earth. Such deposits will help scientists unravel the history of climate change on Mars.
An eighth-century mosaic adorns an Islamic palace in Jericho, but few visitor come to see the masterpiece. Political unrest has crippled the West Bank's tourism industry, and looting threatens its hoped-for rebirth.
Rhinos extended their range from Africa and mainland Asia as far east as Borneo when sea levels dropped. Of the Sumatran rhino, once also found in India and Southeast Asia, only about 300 survive in the wild. The Javan rhino is also endangered.
Mark Duffy Moose Jaw, Saskatchewan - "The Saskatchewan prairies offer skies that go on forever," says Mark Duffy, a 52-year-old portrait photographer who captured a storm and the inevitable rainbow." This photo was voted an ngm.com audience favorite. (picture from you shot)
Sunset on Mars casts bluish light over the distant horizon. It's a deceptively familiar view. We barely know our neighbor, especially when it comes to big questions: life. "Mars was a habitable world at some point early in its history," says Jim Bell, a planetart scientist at Cornell University. "We don't know exactly when, and don't know precisely where. Future missions will have to figure that out."
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