"From Wikipedia, the free encyclopedia
"The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the eye for protection and to moisten the eye while also keeping visibility....
"Woodpeckers tighten their nictitating membrane a millisecond prior to their beak impacting the trunk of a tree in order to prevent their eyes from leaving their sockets."
Sunday, August 30, 2009
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment