The US Department of Agriculture last week issued a conditional license for an avian flu vaccine for use in chickens, as an outbreak of a newer variant ravages poultry flocks,…
Ukraine claimed Saturday to have struck one of Russia’s largest oil refineries in a drone attack, starting a fire at the facility more than 700 miles into Russian territory.
A mass extinction event wiped out around 90% of life. What followed has long puzzled scientists: The planet became lethally hot for 5 million years. Researchers say they have figured…