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Shark populations decline by up to 90 percent along Australian coast

NASA's InSight lander captures intimate sights and sounds of Mars

First-ever insect vaccine could help save bees

More than 95% of the world's population is breathing unsafe air

Meet the bilby! 5 fast facts about this adorable Australian animal

Sully, George H.W. Bush's service dog, has a new mission

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Photo blog

Why does the sky sometimes turn purple?

All-women film team takes on border wall on behalf of all at-risk wildlife

'Psychedelic' jellyfish dominates the deep-sea dance floor

Ecologists share their passion for nature in these winning images

10 wonders of the solar system

Artist explores the natural world with a nose for the otherworldly

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Photo galleries

7 of the smallest amphibians and reptiles

17 extraordinary bookstores

10 warming winter dishes from around the world

9 of the coldest places in the world to live

Free bird: Thanksgiving turkey pardons

10 cultural variations on Thanksgiving

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