Caral, Peru, had 6 pyramids. The largest of these mounds, "Piramide Mayor," is 60-feet high and 450-by-500 feet at the base, and they have been carbon-dated at 2627 B.C. - which is the same time as when King Djoser was building the Egypt's first pyramid, the Step Pyramid at Saqqara.

"Dr. Ruth Shady believes Caral was a sacred city and administrative center for a civilization that built 17 other sites, most still buried in the Supe Valley and on the nearby Pacific coast."

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MSNBC reports that two sets of researchers have come to the same conclusion - there is a giant planet or failed star in a 4-6 million year orbit around the Sun, 800 times further away than Pluto. When the Space Infrared Telescope Facility is launched next year it might be able to spot it.

"Some theorists have proposed that the gravitational effect of a massive unseen object in a distant orbit — nicknamed “Nemesis” or the “Death Star” — could set off periodic cometary storms, which would increase the chances of a catastrophic impact with Earth."