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 .