Here's How Much of Your Suntan Comes from Beyond Our Galaxy

Every second, every square meter of Earth is bombarded by 10 billion photons born beyond the Milky Way, according to a new study. That may sound like a lot, but it's just 10 trillionths of the total number that bathe every square meter of the planet.

from Live Science http://ift.tt/2aOBn7B
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