Comparison of even-toed ungulate and cetaceans genetic material has shown that the closest living relatives of whales and hippopotamuses is the paraphyletic group Artiodactyla. Dan Graur and Desmond Higgins were among the first to come to this conclusion, and included a paper published in 1994.
Definition of roundâtrip. : a trip to a place and back usually over the same route.
A field trip or excursion is a journey by a group of people to a place away from their normal environment.When done for students, it is also known as school trip in the UK, New Zealand, Philippines; and school tour in Ireland. field trip or excursion is a journey by a group of people to a place away from their normal environment.