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On the surface, the scene on Columbia University’s campus appeared to have returned to normal after a spring semester rocked by pro-Palestinian encampments and police crackdowns. Students ate lunch on green lawns last week and tapped a volleyball back and forth under sunny skies. But, “like a horror film,” said …

Tens of thousands of children across the Southeast remain out of their classrooms one week after Helene, the deadliest hurricane to strike the mainland United States since Katrina. They are cut off from academics, friends and stabilizing routines. Hurricane Helene ravaged school buildings, demolished football fields and killed young children …

Comb jellies, the delicate bells that pulse their iridescent bodies through the ocean, are some of the strangest creatures on earth. “They are the aliens of the sea,” said Leonid Moroz, a neuroscientist at the Whitney Laboratory for Marine Bioscience in St. Augustine, Fla. The aliens belong to the oldest …