A cosmic collision off the Yorkshire coast triggered a mega-tsunami taller than Big Ben that swept across the prehistoric North Sea - and scientists have finally confirmed it. Following two decades of heated controversy, researchers claim a 160-metre-wide space rock crashed into what is now the southern North Sea roughly 40 million years ago, gouging out a concealed crater and generating a wave exceeding 100 metres (330ft) in height. Shocked minerals and state-of-the-art seismic imaging that