Introduction NASA launched Voyager 2 on August 20, 1977, as a space probe with the mission of studying the outer planets and exploring interstellar space beyond the Sun's heliosphere. Voyager 2 is the twin of Voyager 1, which had been launched only a few days prior. Voyager 2 has successfully...
The Earth's magnetic poles have reversed many times throughout its history. The last reversal was about 780,000 years ago. When the poles reverse, the north magnetic pole becomes the south magnetic pole, and vice versa. This reversal is caused by changes in the flow of liquid iron in the Earth's...
Scientists have discovered two gigantic structures deep within the Earth that could be the remains of an ancient planet. The structures, which are each the size of a continent and 100 times taller than Mount Everest, were found in the Earth's mantle, the layer of rock that lies between the...
