Diamonds are famous for their strength, but scientists have long suspected that another form of diamond might be even harder. Evidence of this was gathered over the past sixty years in meteorite ...

Visitors to the coast of Northern Ireland have always marveled at the so-called Giant’s Causeway — a field of some 40,000 interlocking basalt columns arranged in a tidy hexagonal pattern. German ...

Diamonds may be the strongest known natural material, but researchers have just created some stiff competition. By firing a dime-sized graphite disk at a wall at 15,000 mph (24,100 km/h), scientists ...