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Science Panorama
The Animal’s Tool Box
From chimpanzees to crows, from dolphins to octopi: Why did this ability develop in only a few species, and why them?
March 22, 2020 זמן קריאה משוער 12 -
Science Panorama
The Time-Travel Paradoxes
What happens if a time traveler kills his or her grandfather? How do you stop a time machine from just appearing somewhere in space, millions of kilometers from home?
March 22, 2020 זמן קריאה משוער 12