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• The photos that confirm it: NASA’s X-59 fires up its afterburner and takes a key step toward breaking the sound barrier without breaking our ears
• 60,000-year-old poisoned arrows discovered in South Africa reveal that early humans mastered lethal chemistry long before agriculture or writing
• Goodbye to chemical rockets: scientists propose an idea that would allow interstellar travel in just 40 years using beams of electrons traveling at close to the speed of light.
• The pill of the century: a single trip with LSD reduced anxiety for three months, according to a clinical study
• Goodbye to nuclear submarines: Australia signed a $368 billion deal with the United States to receive them, but a new congressional report makes it clear that they may never arrive
• He created a lake to raise fish and installed cameras to monitor them, but ended up attracting eagles, deer, and owls to one of the continent’s most unexpected wildlife sanctuaries
• Chimpanzees apply medicinal plants to their wounds… and also help others
• In 1940, a boy chased his dog through a hole in a tree and ended up finding a secret cave with more than 600 human paintings dating back 17,000 years that no one had ever seen before