On Friday, Dec. 21, some say, the Mayan apocalypse will arrive and the world will end. Fortunately, it won't.

A bold claim, we know, but if it's good enough for NASA, it's good enough for us. The space agency has already issued a press release dated Dec. 22 entitled "Why the World Didn't End Yesterday."

The Mayan apocalypse predictions arise from a misunderstanding of the ancient Maya Long Count Calendar, which wraps up a 400-year cycle called a b'ak'tun on Dec. 21, 2012, the day of the winter solstice. This just so happens to be the 13th b'ak'tun in the calendar, a benchmark the Maya would have seen as a full cycle of creation.

Did you catch that? Cycle. In other words, the Maya had a cyclical view of time and would not have seen the end of their calendar cycle as the end of the world. It wasn't until Westerners began reinterpreting the calendar in the past couple decades that it got its apocalyptic overtones. [Images: Mayan Calendar Carvings]

Mayan apocalypse rumors have proliferated on the Internet, running the gamut from beliefs that Dec. 21 will bring a new era of peace and universal understanding to predictions of a devastating astronomical event. We're all in favor of world peace, but we're here to put your fears to rest about the likelihood of planetary annihilation. Read on for five common Mayan apocalypse fears and why they won't come true.

Prediction 1: The sun will kill us all

Much has been made by Mayan doomsday fear-mongers of the fact that the sun is currently entering a maximum activity phase. The sun rotates through periods of quiet and activity that peak roughly every 11 years; active periods are marked by an increase in solar storms and flares. [See stunning solar flare photographs]

Some of these flares can indeed influence Earth. When the sun releases electromagnetic particles in such a way that they interact with our atmosphere, solar storms can disrupt telecommunications, though there are ways to protect satellites and other electronics. These charged particles are also responsible for the aurora — the Northern and Southern Lights.

Predictions of a Dec. 21 solar storm that will devastate the planet are not based in reality, according to NASA scientists. This particular solar maximum is one of the "wimpiest" in recent history, according to NASA heliophysicist Lika Guhathakurta, who spoke during an online panel on the Mayan apocalypse on Nov. 28. In other words, scientists have no reason to expect solar storms capable of disrupting our society.

Prediction 2: The Earth's magnetic poles will flip-flop

What is it with the Mayan apocalypse and electromagnetism? This rumor holds that the North and South Poles will suddenly and catastrophically change places on Dec. 21.

The idea isn't as totally leftfield as it sounds: The Earth's magnetic field does actually flip-flop occasionally, though not in the course of a day. The pole swaps happen over the course of hundreds of thousands of years, according to NASA. The switching of magnetic poles could lead to a slight increase in cosmic radiation, but previous flip-flops have not disrupted the life seen in the fossil record.

Predicting the magnetic-pole switch is also tough. The last swap occurred about 780,000 years ago, which puts the planet about due for another change in the next several thousand years. However, there has been at least one period where the magnetic poles stayed put for 30 million years. More here- http://news.yahoo.com/5-mayan-apocalypse-myths-debunked-211200159.html