In response to Moscow's invasion of Ukraine, Facebook has temporarily relaxed its ban on violent speech, allowing statements such as "death to Russian invaders" but not credible threats against civilians. As a result of Moscow's war on its neighbour, Western…

It is unlikely that animal-to-human transplantation will be successful in the near future, but experts say it could be so within 30-40 years. The process of xenotransplantation dates back to the 17th century, when attempts were made to use animal blood for…