When American economist Paul Milgrom went to sleep he never imagined what might happen next.

The controversial citizenship policy guarantees visa-free travel across the EU to non-EU nationals.

President Trump holds a campaign rally less than two weeks after testing positive for Covid-19.

The report raises questions about how much immunity can be built up to the virus and how long it may last.

Bats have been scapegoated by humans for centuries, with Covid only the latest example, say scientists.

Nigeria's #EndSARS protests gathered momentum online, but burst onto the streets to force a change.

Plants derive energy from carbon dioxide in the air and scientists are trying to mimic that process.

Specially trained dogs in Lebanon are learning to detect coronavirus as part of a research project.

Vigo County in Indiana has backed every winning candidate since 1888, bar two.

As President Trump pushes "patriotic education", some teachers want US history curriculum reform.