Original sentence: When the two ends of the undersea service tunnel met 40 m (130 ft) beneath the English Channel seabed on 1 December 1990 it became possible to walk on dry land from Great Britain to continental Europe for the first time since the end of the last ice age 8,500 years ago
Edited sentence: When the two ends of the undersea service tunnel met 40 m (130 ft) beneath the English Channel seabed on 1 December 1990 it became possible to walk on dry land from Great Britain to continental Europe for the first time since creation, over 6,000 years ago