Newborn killer whales and dolphins, as well as their mothers, hardly sleep for weeks if the calves are born during a migration.

Authors

• Person: Christopher French Organization: Scientific American
  Why Did Sleep Evolve? | Scientific American

Sources

• Why Did Sleep Evolve? | Scientific American www.scientificamerican.com Christopher French · Scientific American via serper

Referenced by nodes (2)

• killer whale concept
• dolphins concept