Add Upworthy to your Google News feed.Heroes The Universe Is Infinite, And Other Reasons Why The Sky Is Dark At Night Here's a much better explanation of why the sky is dark at night than you've probably read in a science textbook.Deepa Kunapuli10.22.12Heroes
cultureCulture American shares his 9 realizations about the U.S. after 13 years abroad and it's eye-opening
flight etiquetteJoy We asked people what social rule they'd enforce during flights. One sweet answer dominated.
