Ancient whales walked on four legs and moved like giant otters -- seriously
今日の英語の習慣化の題材は...
古生物学から... 大昔のクジラは四つ脚で陸地を歩いていたらしいという物です。
(CNN) - The whales we know today look nothing like they did millions of years ago.
Instead, cetaceans, the group including today's whales and dolphins, evolved 50 million years ago from small four-legged animals with hooves.
Rather than being one of the largest creatures on Earth, as they are now, they came from creatures that were the size of an average dog.