Renowned explorer Robert Ballard has scoured the deep sea for decades in search of its mysteries. He and Alvin, a three-person submersible, returned to the site in 1986 to capture imagery revealing artifacts left behind by those who had perished. Ballard helped develop Alvin in the 1960s at the Woods Hole Oceanographic Institution in Massachusetts. Together, he and Alvin have dived into the deep to observe underwater mountain ranges and uncover thermal vents. And now, 99% of the seafloor is...
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