London rail work unearths thousands of skeletons from Bedlam

They came from every parish of London, and from all walks of life, and ended up in a burial ground called Bedlam. Now scientists hope their centuries-old skeletons can reveal new information about how long-ago Londoners lived—and ...

Molecular ruler sets bacterial needle length

When a salmonella bacterium attacks a cell, it uses a nanoscopic needle to inject it with proteins to aid the infection. If the needle is too short, the cell won't be infected. Too long, and the needle breaks. Now, University ...

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