| Share
 

whale

Introduction

whale, aquatic mammal of the order Cetacea, found in all oceans of the world. Members of this order vary greatly in size and include the largest animals that have ever lived. Cetaceans never leave the water, even to give birth. Although their ancestry has been much debated, DNA studies and skeletal evidence from extinct early whales indicate that whales evolved from the ancestors of artiodactyls, a group that includes hippopotamuses, cattle, swine, deer, and chevrotains; DNA evidence suggests that whales are most closely related to hippopotamuses.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Vertebrate Zoology

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring
 
Warning: include(Mobile_Detect.php): failed to open stream: No such file or directory in /site/html/template/www.infoplease.com/trailer.php on line 412 Warning: include(): Failed opening 'Mobile_Detect.php' for inclusion (include_path='/site/lib/vendor/pear-pear.php.net/Mail:/site/lib/vendor/pear-pear.php.net/Net_Socket:/site/lib/vendor/pear-pear.php.net/Net_SMTP:.:/site/lib:/site/vendor:/usr/share/pear:/usr/share/php:/site/html') in /site/html/template/www.infoplease.com/trailer.php on line 412