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Science
Peruvian citadel that is nearly 4,000 years old opens doors to tourists
The biggest piece of Mars on Earth is going up for auction in New York
Princeton study maps 200,000 years of Human–Neanderthal interbreeding
New clues from two million-year-old tooth enamel tell us more about an ancient relative of humans
Dark matter could create dark dwarfs at the center of the Milky Way
Returning to the office isn't the answer to Canada's productivity problem—and it will add pressure to urban housing
The ACT wants dog owners to spend three hours a day with their pet—but quality, not quantity, matters most
Permanent retention of exceptional trees can improve ecosystem integrity in managed forests
Florida cat sniffs out another new virus—and scientists are listening
Scientists just found 200+ hidden proteins that may drive Alzheimer’s
Inside the Maya king’s tomb that rewrites Mesoamerican history
It’s never too late: Just moving more could add years to your life
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