Dolphins can stay alert and active for 15 days or more by sleeping with one half of their brain at a time, scientists have learned.
The trick of keeping half the brain continuously awake is vital to the sea mammals’ survival, experts believe…
Dolphins can stay alert and active for 15 days or more by sleeping with one half of their brain at a time, scientists have learned.
The trick of keeping half the brain continuously awake is vital to the sea mammals’ survival, experts believe…