Raising concerns as to the safety and ethics of keeping animals in captivity for commercial use and performance: “An ice-skating bear with a touring Russian circus has killed a circus manager and seriously injured a trainer in the Kyrgyz capital, Bishkek. Kyrgyz officials said the bear turned on the manager, 25-year-old Dmitry Potapov, during a rehearsal. The bear, who had skates on at the time, severely mauled another circus worker who tried to rescue the manager. Kyrgyz police shot and killed the bear when they arrived on the scene. It is not clear what caused the attack. The five-year-old bear attacked Mr Potapov, dragging him across the ice and leaving him with fatal injuries. A 29-year-old circus employee who tried to rescue Mr Potapov was badly injured and is in a critical condition, said Kyrgyz doctor Gulnara Tashibekova.”
"I grew up in New Jersey in the 1970s and that experience gave me everything I needed to become a skeptic."
The paper does not prove the existence of dark matter, but it mostly eliminates a rival theory called Modified Newtonian Dynamics.
How to figure out the right amount of time for any project.