The carcass of a massive shark was discovered washed ashore on a British beach, as an investigation was launched by experts to find out how it died. The two-and-a-half metre thresher shark was discovered at about 8am on New Year's Day on Par beach, Cornwall. Described as "shy and harmless" to humans, the large fish cross through UK waters during migrations - usually in the summer months. Teams from Cornwall Wildlife Trust later collected the body and plan on conducting an autopsy to determine