alleryIn which year were hydrothermal vents first discovered in the ocean depths?
A1857
B1917
C1977
D2007
Answer & Solution
Correct answer: C. 1977
1. Hydrothermal vents are undersea hot springs.
2. They form where seawater is heated near hot magma.
3. They were first discovered in 1977.
_Source: Wikipedia, Habitat, Extreme habitat types_
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