Natural stone arches are commonly made of sandstone or limestone and are found in coastal cliff areas that can be eroded by wave action. Other arches...

Recently, video footage captured the spectacular collapse of an estimated 11,000 tons (22 million pounds) of rock, as a section of England’s Broadchurch...

It has traditionally been thought in biology that invertebrates were somehow simple and less complex than vertebrates. But in past decades, this has...