Last Updated:2022/12/24

Researchers in the US found that the wingspan of American cliff swallows, which took up the habit of colonising concrete highway bridges in the 1980s, had decreased by about two millimetres a decade since then.

音声機能が動作しない場合はこちらをご確認ください
Edit Histories(0)

Sentence quizzes to help you learn to read

Edit Histories(0)

Login / Sign up

 

Download the app!
DiQt

DiQt

Free

★★★★★★★★★★