The EF English Proficiency Index is carried out every year. The study rates the English language level of adults in 70 countries in which English is not the first language. The latest report says Sweden leads the world in English. The report places Libya last.
Viral hepatitis infections kill nearly one million people a year. The majority of cases are in Asia and in African countries south of the Sahara. A vaccine and treatment for some forms of hepatitis are now available. But they can be costly.
A scientist looked at how the chemical oxybenzone affects coral. He says it does three things: It causes their exoskeletons to turn white, and it damages the adult coral’s DNA, or genetic structure. The genetic damage also hurts the coral at the larvae stage, when it is very young.
Danish researchers examining human teeth fossils have discovered evidence of the plague from 4,800 years ago. In the middle 1300s the disease killed 50 to 60 percent of Europe’s population. But the bacterium was not nearly as aggressive in its earlier form says the study leader.