Europe to hold competition to build space cargo ship

The European Space Agency announced Monday it would hold a competition between firms to build a ship to deliver cargo to the International Space Station, in a potential first step towards independent missions carrying astronauts.

Greener neighborhoods can protect us—at the cellular level

A new study finds that greenspace—the vegetation in a neighborhood's yards, parks and public spaces—has a positive impact on a key genetic marker associated with exposure to stress. However, the study also finds that ...

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