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His pioneering work on the origins of cancer was later overshadowed by his contrarian views, notably his rejection of the established theory that H.I.V. causes AIDS.
Read MoreAs a Navy mathematician in the 1950s and beyond, she played an unheralded but foundational role in making possible the global satellite-based mapping system.
Read MoreThe United States is the only country to pull out of the global agreement among nations to fight climate change. European diplomats say the U.S. reputation is suffering.
Read MoreThe finding, along with the discovery of a 500,000-year-old hammer made of bone, indicates that our human ancestors were making tools even earlier than archaeologists thought.
Read MoreDrawing on his love of fly-fishing, he developed a balloon catheter that removes blood clots from patients’ limbs in a minimally invasive way. It has saved millions of lives.
Read MoreHis containment strategy helped wipe out the disease in the 1970s, one of the world’s greatest public health triumphs. He also led the C.D.C. and promoted childhood vaccination worldwide.
Read MoreShe and her staff at Union Carbide created synthetic materials that improved various industrial processes, including purifying water. She also developed a way to make emeralds.
Read MoreRising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all scientists agree.
Read MoreThe sensors used to listen for earthquakes could help protect people from the hazards created by falling spacecraft.
Read MoreHe accidentally created some of the first quantum dots, tiny semiconductors that now power many electronics.
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