Submarine A submarine is a submersible vessel that moves in three dimensions, on the surface and underwater. Invented for the first time in 1624 by Cornelis Drebbel. A submarine is a submersible vessel capable...
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21 Minutes
46 Minutes
Cervical Cancer | Symptoms, Stages, Types, Diagnoses, Chances of Surviving, Treatments
What is cervical cancer? Cervical cancer starts in cells of the cervix. Cancerous (malignant) tumor is a group of cancer cells that can invade and destroy nearby tissue. The tumor can also spread (metastasize)...
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