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Space

Safe from black holes

The Large Hadron Collider could generate black holes, but they would be too tiny and short-lived to do any harm and would be no more malevolent than the cosmic rays constantly bombarding Earth, two new reports find.

Health & Medicine

Heel test

A simple, inexpensive ultrasound test of the heel might reveal whether a person is at risk of osteoporosis and should get more extensive tests.

Life

Nearly immortal sea creature spreads

Hydrozoan with reversible life cycle now found worldwide.

Health & Medicine

Curative leaf

Compound in marijuana reduces inflammation without the psychological effects.

Health & Medicine

Pain, numbness, pain

Some anesthetics not only cause a burning feeling when they're given, but can also increase the pain felt after surgery.

Humans

Schooling the vote

Where you cast your ballot can affect how you cast your ballot.

Humans

Whaling back to the future

International commission meets after soul-searching on years of dispute.

Life

When cells go quiet

Connections between nerve cells may be lost when communication between the cells lapses.

Health & Medicine

Breathe easy

When it comes to heart function, the concentration of pollution in the air may matter less than its chemical makeup.

Space

Ice on Mars

White stuff on Mars is water ice, Phoenix team confirms.