Have you ever wondered whether animals can predict natural disasters, is a dog’s mouth cleaner than a human’s or perhaps The Great Wall of China is the only manmade structure visible from space? The answers to some of these myths and more can be found on Live Science. Some of the answers might even surprise you. Here are two examples:
There is no gravity in space
Blame the term "zero-gravity" for this common misconception. Gravity is everywhere, even in space. Astronauts look weightless because they are in continuous freefall towards the Earth, staying aloft because of their horizontal motion. The effect of gravity diminishes with distance, but it never truly goes away. Oh, and while we're at it, it's also untrue that space is a vacuum. There are all kinds of atoms out there, albeit sometimes far apart (and this thin gas adds to the collective gravity budget, too!)
Humans use only 10 percent of their brains
This media darling has been around for at least a century. Fortunately, it's just not true. MRI imaging clearly demonstrates—with fancy colors no less—that humans put most of their cerebral cortex to good use, even while dozing.
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Live ScienceTags: Myth | Gravity | Space | Brain | Science
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