Video: Sentinel-2A liftoff

Replay of the Sentinel-2A liftoff on a Vega launcher from Europe's Spaceport in French Guiana at 01:52 GMT (03:52 CEST) on 23 June 2015.

Keeping bacteria at bay in Hawaiian water bodies

During heavy rains, Hawaii's streams, rivers, and nearshore waters change on microscopic levels. Bacteria in these aquatic systems increase, and some of these bacteria can be harmful to human health. They can cause problems ...

Urban light pollution is a danger for marine ecosystems

Cities are artificially lit to allow humans to make use of the night. This light pollution means that stars are often barely visible in urban skies. But reduced stargazing is not the only impact of artificial light at night.

Darkened fjord waters mean fewer fish, more jellyfish

The seawater in the Baltic Sea, the North Sea, and Norway's coastal waters and fjords is gradually getting darker. Researchers are observing signs similar to those from overproduction of organic compounds. The result may ...

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