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The comets A6 (Lemmon) and R2 (SWAN) are visitors from the chilly fringes of our solar system, and could even be visible at the same time.
Read MoreHer discoveries as a primatologist in the 1960s about how chimpanzees behave in the wild were hailed as “one of the Western world’s great scientific achievements.”
Read MoreDr. Jeanne Marrazzo, who was on administrative leave, alleged that the Trump administration had defied court orders and undermined vaccine research.
Read MoreA Times correspondent who interviewed Dr. Goodall recalled their conversations about the state of the planet.
Read MoreHer discoveries as a primatologist in the 1960s about how chimpanzees behave in the wild were hailed as “one of the Western world’s great scientific achievements.”
Read MoreThe primatologist gained scientific acclaim for her work with chimpanzees and then later used her fame to champion conservation.
Read MoreA 437-million-year-old fossil from a deposit in Wisconsin could be the oldest species of leech ever found.
Read MoreThe discovery of huge petroglyphs of camels and donkeys, as well as hundreds of engraving tools, hints at complex early settlement in the region following the Ice Age.
Read MoreThe E.P.A. plan would allow grocery stores, air-conditioning manufacturers and others to phase out hydrofluorocarbons in cooling equipment more slowly.
Read MoreThe address comes 10 years after his predecessor’s groundbreaking statement on global warming. His words will be watched for signals on the direction of the new papacy.
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