More than a century ago, Pavlov trained his dog to associate the sound of a bell with food. Ever since, scientists have assumed the dog learned this through repetition. The more times the dog heard ...

A global atlas mapping two key gut bacteria in infants around the world has uncovered a treasure trove of bacterial strains ...

Differences over when Ramadan begins are often justified on 'jurisprudential' grounds, yet they expose how politics can hijack moon-sighting and ritual. View on euronews ...