“…it suggests people have something in common with birds and sea mammals, which frequently put half their brain to sleep while the other half remains on guard.”
Link: http://n.pr/21dtqJt
What do you think?
I'd love to hear from you.
“…it suggests people have something in common with birds and sea mammals, which frequently put half their brain to sleep while the other half remains on guard.”
Link: http://n.pr/21dtqJt
I'd love to hear from you.