Guinea worm and polio are the two diseases now closest to being eliminated. Only smallpox and rinderpest — a disease of cattle and other hoofed animals — have ever been wiped out.
Guinea worm and polio are the two diseases now closest to being eliminated. Only smallpox and rinderpest — a disease of cattle and other hoofed animals — have ever been wiped out.
Because Gliese 581 is only 1% as bright as the Sun, it exudes little warmth, and its habitable zone lies much closer. At this distance, planets get locked into strong gravitational pulls that tend to slow their rotation.
Gliese 581g is part of a string of planets in the Gliese 581 solar system. Two of Gliese 581g's siblings - Gliese 581e and Gliese 581b - orbit too close to their parent star to support any kind of life on them.
Planets that orbit too close to or too far away from their stars do not have a suitable climate; this can only be found in a slender strip of solar space around each star known to astronomers as a 'habitable zone'.
Other Moche vessels show scenes from what, at first sight, look like a series of battles. But as the archaeologists studied them more closely they realized they weren't ordinary battles.
Some of the pyramids are well over a hundred feet tall. Many are so heavily eroded they look like natural hills; only close up can you see they are made up of millions of mud bricks.