Cosmic threats - Cosmic threats
Cosmic threats (1) Add new question
Question
| Option | Answer | Is Correct |
|---|---|---|
| 1 | A number of other scenarios have been suggested. Massive objects, e.g., a star, large lanet or black hole, could be catastrophic if a close encounter occurred in the solar system. &another threat might come from gamma ray bursts; some scientists believe this may have caused mass extinction 450 million years ago. Both are very unlikely. although alien life has never been found, scientists such as Carl jagan have postulated that the existence of extraterrestrial life is very likely In 1969, the “Extra- Terrestrial Exposure Law’ was added to the Code of Federal Regulations in response to the possibility of biological contamination resulting from the VS Apollo Space Program. It was removed in 1991. Scientists consider such a scenario technically possible, but unlikely. |
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