1+ week, 3+ day ago   (339+ words) Friends season 5 episode 16: Ross tries to move the sofa 'PIVOT!' Long-standing Friends sofa problem cracked by Korean mathematician - Korean mathematician Dr Baek Jin Eon has resolved the long-standing "moving sofa problem", a geometry puzzle that has challenged researchers for nearly…...

7+ mon, 3+ week ago   (717+ words) Birdbrain" used to be a common insult but corvids have such surprising intelligence Birdbrain" used to be a common insult but corvids have such surprising intelligence Many of us as children may have wondered what"s going on inside the…...