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Mother Nature Rocks

Located in one of the flattest places on the face of this planet are the strange and unexplained Sailing Stones of Racetrack Playa, Death Valley, California. Once a year the "Playa" or flat desert pan experiences short winter rains and becomes slippery as the hexagonal desert floor turns back to mud. During this time the boulders and rocks move leaving clearly visible tracks behind them.

The General Sherman is the largest tree, standing 275 feet in the Sequoia National Park. >> Michael Nichols/National Geographic

Phyllis Diller carrying a purse. >> Meet the Ruff, a rather peculiar bird from Norway.

The lantern bug (Pyrops candelabria)

For scale, look for the men in orange. One at the bottom, one at the top. >> The President tree is the name of a giant sequoia located in the Giant Forest of Sequoia National Park in the United States, east of Visalia, California. The tree is believed to be at least 3,200 years old.

Related to the jellyfish and corals, Siphonophore is a continuous chain of specialized polyps - individual animals that grow from one another in an organized colony. Some in the colony are devoted to feeding, armed with stinging cells to snag fish or invertebrates. Others are devoted to locomotion, propelling the whole group with a continuous pumping motion while some exist only to reproduce.