Original: On 5 March 2007, a team of scientists on board the RRS James Cook embarked on a voyage to an area of the Atlantic seafloor where the mantle lies exposed without any crust covering, mid-way between the Cape Verde Islands and the Caribbean Sea.
Simplified: On March 5, 2007, a team of scientists on board the RRS James Cook went on a voyage to an area of the Atlantic seafloor where the mantle has no crust covering.