Related topics: smoking

Humans evolved to get better sleep in less time

Insomniacs take heart: Humans get by on significantly less sleep than our closest animal relatives. The secret, according to a new study, is that our sleep is more efficient.

Jupiter's Europa moon 'likeliest to have life'

US astronomers looking for life in the solar system believe that Europa, one of the moons of Jupiter, which has an ocean, is much more promising than desert-covered Mars, which is currently the focus of the US government's ...

Mars Curiosity celebrates sol 2,000

NASA's Mars Curiosity rover just hit a new milestone: its two-thousandth Martian day, or sol, on the Red Planet. An image mosaic taken by the rover in January offers a preview of what comes next.

Exoplanet climate 'decoder' aids search for life

After examining a dozen types of suns and a roster of planet surfaces, Cornell University astronomers have developed a practical model—an environmental color "decoder"—to tease out climate clues for potentially habitable ...

Earth's moon may not be critical to life

The Moon has long been viewed as a crucial component in creating an environment suitable for the evolution of complex life on Earth, but a number of scientific results in recent years have shown that perhaps our planet doesn't ...

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