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Hot Air Balloon

A NASA hot air balloon carrying a telescope for detecting black holes called X-Calibur. Photo: NASA/University of Washington

Searching for black holes from a telescope that will be carried by a giant balloon

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Over the shoulders of the jumper Felix Baumgartner. Photo: Red Bull Stratos.

The jump from the edge of the atmosphere: Felix Baumgartner landed safely (photos, video) and achieved a world record in freediving

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