28/10/2015

Researchers compare 'natural' mosquito repellents to DEET

Every summer while preparing for long weekends at our family cabin in the north woods of Minnesota, we'd face the same dilemmas. What food should we bring? Is SPF 50 sunscreen enough protection? And, most importantly, which ...

Rosetta finds molecular oxygen on comet 67P (Update)

Stunned scientists announced Wednesday the unexpected discovery of large quantities of oxygen on a comet which streaked past the Sun in August with a European spacecraft in tow.

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