News

  1. Earth

    Ancient hot spell is linked to copious carbon dioxide

    A mineral that formed in some lakes during a lengthy and particularly warm period in Earth's past suggests that atmospheric concentrations of carbon dioxide were at that time at least triple those found in today's air.

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  2. Planetary Science

    Web Special: Welcome to Mars’ Victoria Crater

    With stunningly powerful vision, the HiRISE camera on NASA's Mars Reconnaissance Orbiter has taken a remarkable picture that shows the exploration rover Opportunity poised on the rim of Victoria Crater on Mars.

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  3. Wasting Deer: Deer saliva and blood can carry prions

    Saliva alone can transmit a brain-destroying disease from one animal to another.