Where Did We Come From? Explore the origin of our solar system and the start of life itself, how head lice figure in human evolution, and more. Revealing the Origins of Life. How did molecules first make the leap from non-living to living? An English chemist may have solved part of the mystery. Is There Life on Mars? The decades-long search for life on the Red Planet heats up with the discovery of frozen water. How One Man Reclassified Life
To research the causes of Erdheim-Chester Disease, consider researching the causes of these these diseases that may be similar, or associated with Erdheim-Chester Disease: 1  Polyostotic sclerosing histiocytosis. 2  Bone pain. 3  Retroperitoneal fibrosis. 4  Diabetes insipidus. 5  Exophthalmos. 6  Dyspnea. 7  Ataxia.
What causes Prader-Willi syndrome? Prader-Willi syndrome is caused by a genetic defect on chromosome number 15, which happens purely by chance. The condition is rare, affecting no more than one in every 15,000 children born in England. Boys and girls of all ethnic backgrounds may be affected.