Uncategorized
- Animals
Female hyenas kill off cubs in their own clans
Along with starvation and mauling by lions, infanticide leads as a cause of hyena cub death. Such killings may serve to enforce the social order.
- Health & Medicine
A man in Hong Kong is the first confirmed case of coronavirus reinfection
During a 33-year-old man’s first round with the virus, he had symptoms, but not the second time — a hint his immune system protected him from disease.
- Quantum Physics
A measurement of positronium’s energy levels confounds scientists
A gap in the energy levels of positronium seems to be substantially larger than predicted, and physicists don’t know why.
