A new LSU research study suggests clustered pits in the Pioneer Terra region on Pluto are related to the dwarf planet's suprising robust atmosphere. The pits resemble gas pockmarks on Earth where methane seeps from the subsurface. These pits may supply atmospheric methane on Pluto.

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"It's incredibly energy-intensive and the birds use up to 50% of their body mass," he says.

This was Collins's last flight. She tells us that she always planned to stop after her fourth mission - to give others a chance to go to space.

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Monday’s snowball fight, which appeared to be organized by social media content producers, caused a chaotic scene as a large crowd amassed at the popular park to wing snowballs at each other during a winter storm.

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