A nearly 540-foot-wide asteroid crashed into the North Sea, only 80 miles off the coast of East Yorkshire... 43 million years ago. A nearly 540-foot-wide asteroid crashed into the North Sea, only 80 miles off the coast of East Yorkshire… 43 million years ago. The immense space rock (or possibly a cosmic-sized snowball called a comet) caused a mammoth, 330-foot-high tsunami. This... [4032 chars]