Please choose the correct answer to the question: Currently, Antarctica is the coldest and driest place on Earth. Paleontologists have found dinosaur fossils in rock layers below the ice. Based on this evidence, which is a reasonable conclusion about the climate of Antarctica in the past?

Answer1: Antarctica has always had the same climate as at present. Answer2: At some time in the past, Antarctica was a hot, dry desert. Answer3: At some time in the past, Antarctica was much warmer and wetter. Answer4: At some time in the past, Antarctica was colder and wetter than it is now.

Answer format: answer1/answer2/answer3/answer4