Most modern viruses have ancient roots. New research suggested RNA viruses are millions of years old, many tracing their evolutionary histories back to the earliest vertebrates. Some viruses may be as old as the first animals.
Protest rallies have erupted outside a courthouse in the US state of Ohio after a judge declared a mistrial in the shooting death of an African-American man by a white campus police officer of University of Cincinnati. The protesters censured the outcome of the trial and accused the local justice system of being biased against minorities.
Modern life is killing children with the number of youngsters diagnosed with cancer rising 40 percent in the past 16 years because of air pollution, pesticides, poor diets and radiation, scientists have warned.
Europe has almost certainly experienced warmer summers in the last three decades than at any other time since the Roman empire, according to a study published on Friday in the Environmental Research Letters journal.