1 The head is one of the most common sites of pain in the body. 2  The most common types of headache can be classified as 1) primary, 2) secondary, and 3) cranial neuralgias, facial pain, and other headaches. 3  The most common types of primary headaches are 1) tension, 2) migraine, and 3) cluster.
Gassy signature of habitability spied in the atmosphere of a 'hot Jupiter'. Katharine Sanderson. Carbon dioxide, one of the telltale signs that a planet may be able to support life, has been spotted in the atmosphere of a gas giant orbiting a star 63 light years from Earth.
Jupiter is around five times less dense than Earth, so an Earth the size of Jupiter would have tremendous surface gravity, would generate a very large amount of geothermal energy. From calculations based on the compressibility of rock, Earth would settle at 4 times the radius, so 16 times more surface for people to live on.