Police arrest suspect in 1989 cold case killing of 78-year-old Pennsylvania woman

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New research could solve the mystery behind the construction of Egypt's pyramids

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Climate in Crisis

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World's oceans have gone 'crazy haywire,' officials warn, with majority of coral reefs in peril

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Cities look for new ways to keep people safe — and alive — as extreme summer heat looms

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Universal History Archive via Getty Images

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First crewed launch of Boeing's spacecraft is delayed yet again due to a new issue

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Could Dyson spheres exist in our galaxy?

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Concrete made from sugarcane could help fight climate change

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For the tiniest infants born with heart defects, a pacemaker the size of a pill now provides hope to families who are dealing with the problem. NBC News' Yamiche Alcindor reports.

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Orcas sink yacht with 2 aboard in Strait of Gibraltar

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Big banks still funnel hundreds of billions into the fossil fuel industry, report shows

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San Francisco poised to become first U.S. city to ban 'forever chemicals' in firefighter gear

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Canadian wildfires trigger air quality alerts across 4 U.S. states

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In the mystery of Florida's bizarre spinning fish, a leading suspect has emerged

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Auroras expected to continue as forecast calls for geomagnetic storm activity into Tuesday

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Auroras illuminate night skies around the world, expected to possibly continue through Monday

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Severe solar storm expected to supercharge northern lights across the U.S.

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Elon Musk's Neuralink suffers setback after implant threads retract from patient's brain

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Can heavy snowfall trigger earthquakes? A new study suggests a link

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Astronomers finally detect a rocky planet with an atmosphere

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Preakness 2024 live updates: How to watch, start time, best horses to bet

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Sex offender arrested after faking death to avoid registering, Arizona sheriff says

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Israel recovers another slain hostage; pushes into new parts of northern Gaza

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L.A. County investigating reported hepatitis A case at Beverly Hills Whole Foods

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Netanyahu rival Benny Gantz says he'll quit Israel's War Cabinet on June 8 unless new Gaza plan devised

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Imprisoned Oregon man charged in deaths of three women found in Portland area last year

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Some consumers are punting big purchases like pools and mattresses

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Arizona police rescue 6-month-old who had been shot during hostage standoff

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Houston distributes water as more than 500,000 remain without power after devastating storms

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Rudy Giuliani is served indictment papers at his own birthday party after mocking Arizona attorney general

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Flash floods due to unusually heavy seasonal rains kill at least 68 people in Afghanistan

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Man who sought revenge for a stolen phone pleads guilty to fire that killed a Senegalese family of 5

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Phoenix is beating the rest of the country on inflation — on paper anyway

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College students who protested and those who didn't share in disappointment at response from schools

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Alabama Republicans pledged to revisit IVF in hopes of a long-term fix. They never did.

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Study links talc use to ovarian cancer — a potential boon for thousands suing J&J

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Slovak PM is stable after 'miracles' in the hospital as suspect is ordered detained

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Four minors found working at Alabama poultry plant run by same firm found responsible for Mississippi teen's death

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They served as military surgeons — now they're taking on a life-or-death issue at home

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