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In 1974, a geneticist named Marsha Jean Falco devised an ingenious research tool to help determine whether epilepsy in dogs was an inherited trait. She drew a series of symbols on index cards, where ...

It's supposed to be a simple maths puzzle - but it's left many scratching their heads. Physical fitness and mental health are two sides of the same coin. To keep your brain in tip-top condition, it's ...

A maths puzzle that should be easy to answer is leaving people online baffled, as one word in the question makes it 'harder ...

A viral maths puzzle is leaving people scratching their heads, as although the answer is simple, one thing makes the question ...