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.
Ronald McNair (third in line) and his fellow Challenger astronauts head to the launch pad at Kennedy Space Center to board the space shuttle on Jan. 27, 1986. Steve Helber/AP Ronald McNair was one of the astronauts killed 25 years ago on Jan. 28, when the space shuttle Challenger exploded.