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optical tweezers in use

Tiny tweezers

In a first, optical tweezers give Harvard scientists the control to capture ultracold molecules

Science|

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Crow with tool

Clever crows

After using tools, the birds behave more optimistically, study suggests

Science|

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Brian O'Shea

What fuels prejudice?

Study rebuts theory that increased contact boosts racial tensions, suggests fear of exposure to disease as possible cause

Health|

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