NEET BIOLOGY

Detailed explanation-1: -The remains of all seven astronauts were recovered, despite the obstacles of terrain and the scope of the search. Searchers combed through pine forests, hundreds of thousands of acres of underbrush, and boggy areas.

Detailed explanation-2: -On February 1, 2003, Space Shuttle Columbia disintegrated as it reentered the atmosphere over Texas and Louisiana, killing all seven astronauts on board. It was the second Space Shuttle mission to end in disaster, after the loss of Challenger in 1986, which also killed all seven crew members.

Detailed explanation-3: -The STS-107 mission was dedicated to research in physical, life, and space sciences, conducted in approximately 80 separate experiments. The seven astronauts worked 24 hours a day, in two alternating shifts.

Detailed explanation-4: -How many space shuttles were there? Six space shuttles were built, but only five ever flew in space.