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.
Challenger Explosion On January 28, 1986, the tenth mission of the space shuttle Challenger ended in tragic disaster. We remember the seven astronauts who lost their lives that day, including Christa McAuliffe, who was chosen by NASA to pioneer its Teacher in Space program.