Features

In the September 11 Issue:

Features

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Not just a high
Scientists test medicinal marijuana against MS, inflammation and cancer
KatsgraphicsLV/iStockphoto
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In field or backyard, frogs face threats
Amphibians and other sensitive groups encounter chemicals across the landscape
From Left: Snehit/Shutterstock images; M. Leach/Animals Animals; Podlesnyak Nina/Shutterstock Images
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DNA on the move
Nanobot ‘spiders’ learn how to walk
Nicolle Rager Fuller
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A matter of solidity
A material that oozes through itself presents a super physics puzzle
Shane L. Johnson
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Snapshots of the past Rosetta spacecraft returns images of asteroid 21 Lutetia	Orangutans can mime their desires Ability suggests an understanding of others’ perspectives, researchers say	Frogs leapt before they landed Amphibians learned to jump first, then mastered the touchdown