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Grades 9-12

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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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Article: An Ode to O

Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's 4.5-billion-year history, Earth had no oxygen gas as part of its atmosphere.

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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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Article: Earth Without Oxygen

Where would the world be without oxygen? While it's hard to imagine an Earth without it, for nearly the first half of the planet's 4.5-billion-year history, Earth had no oxygen gas as part of its atmosphere.

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Article: Life Makes a Mark

One of the biggest forces that's shaped planet Earth over time is microscopic in size. Explore the global impact of microbes.

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Why Mangroves Matter

Learn more about these forests, once generally dismissed as swampy wastelands but now valued as remarkably diverse and important ecosystems.

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