CallnTalk 로고

CallnTalk 바로가기
  • 오늘의 동영상
  • Home > 온라인강좌 > 오늘의 동영상    
글제목
 Why Don't Sleeping Bats Fall Down?
작성자
 A** (es_albert)
글내용





Why Don't Sleeping Bats Fall Down?











Bats sleep upside down, so how come they don’t fall? Turns out that they’ve got some unusual legs.




작성일자
2015-11-10 오후 3:43:19
첨부파일
Uploaded File : AG00409_.gif