If you know that you are not pregnant, how long is too long before you should be alarmed if you don't have your period? What could be the possible reasons for a delayed period?
WEATHER: The tundra is the coldest and the driest of all the biomes on Earth. There is very little rainfall in the tundra; it rains less than ten inches a year. Winters here are long, and summers short, sometimes they last for only 6 - 10 weeks. In the winter the temperature can reach -50Â°F (-45.5Â°C).
Antarctica is the coldest place on Earth. Greenland is one of the coldest inhabited places on Earth. The Yukon, in Canada's northwest region, is one of the coldest places. During winter, Alaska is one of the coldest places in the world. Siberia, where the Soviet Union established gulags, is one of the coldest inhabited places in the world.