Prolonged spaceflight could weaken astronauts' immune systems

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Researchers report impaired NK-cell function during long-duration space travel.
via Science Daily
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Seeing double could help resolve dispute about how fast the universe is expanding

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How fast the universe is expanding has been puzzling astronomers for almost a century. Different studies keep coming up with different answers -- which has some researchers wondering if they've overlooked a key mechanism in the machinery that drives the cosmos. Now, by pioneering a new way to measure how quickly the cosmos is expanding, astronomers have taken a step toward resolving the debate.
via Science Daily
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Shedding light on Saturn's moon Titan's mysterious atmosphere

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A new study tackles one of the greatest mysteries about Titan, one of Saturn's moons: the origin of its thick, nitrogen-rich atmosphere. The study posits that one key to Titan's mysterious atmosphere is the 'cooking' of organic material in the moon's interior.
via Science Daily
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