The untapped nitrogen reservoir

Guanidine is one of the most nitrogen-rich compounds. It could be a valuable source of organic nitrogen, but only very few organisms can access it. However, certain bacteria manage to obtain nitrogen from guanidine. A Konstanz-based ...

Image: Hubble observes a not-so-close encounter

The twin galaxies NGC 4496A and NGC 4496B dominate the frame in this image from the NASA/ESA Hubble Space Telescope. Both galaxies lie in the constellation Virgo, but despite appearing side-by-side in this image they are ...

Sound provides new insight into the lives of blue whales

The blue whale (Balaenoptera musculus) is the largest animal ever to inhabit Earth. Despite its gargantuan size, many aspects of its biology, behavior and ecology still elude us. This magnificent mammal spends most of its ...

Virgin Galactic re-opens ticket sales for $450,000

Virgin Galactic, which last year flew its flamboyant founder Richard Branson to space, will re-open ticket sales to the general public starting Wednesday, for the sum of $450,000.

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