What are the decomposers in the underwater ecosystem? A: The decomposers in an underwater ecosystem are animal-like organisms called protists, fungi and bacteria. Referred to as saprotrophs, these organisms decom... Full Answer >
On 1 February 2003 the space shuttle Columbia exploded as it was attempting re-entry after a 16-day mission. All seven astronauts on board, including the first Israeli in space, were killed. Tributes to the astronauts were led by US President George W Bush.
Just before noon on January 28, 1986, people watched with excitement as the space shuttle Challenger lifted off from its Florida launch pad -- but that excitement and hope soon turned into horror. Just seventy-three seconds after liftoff, Challenger exploded, killing all seven astronauts on board. One of its crew members was Christa McAuliffe, a school teacher from New Hampshire who had won a national competition to become the first teacher in space.