Fins and wings alike share design features
![humpback whale](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/02/ticker_Costello_MA-GC_free.jpg?fit=860%2C460&ssl=1)
A humpback whale's flukes flex in a similar way that a seabird's wings flap, a new study reveals.
M. Baird
A humpback whale's flukes flex in a similar way that a seabird's wings flap, a new study reveals.
M. Baird