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News
Wild monkeys learn from clues left on stone tools
5+ hour, 10+ min ago (965+ words) Tool use gives some animals access to foods that teeth, fingers, or claws cannot easily open. Yet using a tool is only part of the challenge because the animal must also choose an object with the right qualities for the…...
This geometric puzzle has intrigued mathematicians for 300 years
7+ mon, 2+ week ago (732+ words) Take two identical cubes and ask whether one can pass straight through a tunnel drilled in the other. Now extend that question to every well-behaved solid you can build from flat surfaces. What’s your answer? In 2025, Jakob Steininger and Sergey…...