Researchers conducted the first sea tests of a submersible crucial to the British-based Nekton Mission which will explore the Indian Ocean during a seven-week long science expedition. The submarine was launched from the Ocean Zephyr off the coast of Victoria, the capital of the Seychelles on Tuesday March 5, 2019. The mission will explore the Indian Ocean, during which scientists hope to document changes taking place beneath the waves that could affect billions of people in the surrounding region over the coming decades. (AP Photo/David Keyton)
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