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Grades 9-12

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How the Jelly Got Its Glow

To truly understand the deep sea, scientists need to turn off the lights on their submersible vehicles. Then they can see the ghostly blue flickers of bioluminescence produced by virtually every organism of the deep.

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Welcome to the Subfamily

Meet "Big Red," a new species of jellyfish that is bulbous, dusky red, and huge, nearly one meter (about three feet) in diameter, with several fleshy arms instead of tentacles, like a balloon with greedy fingers.

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Observing Jellies

Long ago, people studied jellies by peering over the side of a boat and drawing the creatures as they bobbed nearby. See how much has changed since the 1800s.

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Article: Lemurs in Madagascar—Now

The ring-tailed lemurs that romp around the research camp at the Beza Mahafaly Special Reserve in southwest Madagascar spend plenty of time behaving badly. The same isn't true for their counterparts in the wild.

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Article: Lemurs in Madagascar—Then

The lemurs of Madagascar, the most diverse group of primates in the world, had even more members in their ranks before humans first arrived on the island two millennia ago — 16 of the perhaps 70 species aren’t around anymore.

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The Uncommon Aye-Aye: An Interview with Eleanor Sterling

The dozens of diverse lemur species on Madagascar are a motley crew. Still, none look and act quite like the aye-aye. Take a closer look at this lemur, which is considered one of the world's strangest animals altogether.

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Essay: Stars in Exquisite Accuracy

There’s only one star that astronomers have a firm grasp on: the Sun. Fundamental facts about other stars remain elusive. Find out how a powerful interferometer atop Mount Wilson in Southern California hopes to change that.

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Article: Sloan Sweeps the Sky

Mapping one-quarter of the heavens in three dimensions — that’s the ambitious mission for the Sloan telescope at the Apache Point Observatory in the Sacramento Mountains of New Mexico. Find out what astronomers have discovered so far.

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