On Wednesday 04 Jul 2007 12:29 pm, Ved Prakash Vipul wrote: > 1) even fish yawn; yawning goes way back into our > evolutionary pasts 2) the inter yawn interval is 68 seconds (i've > timed my yawns a few times - 68 seconds is a spookily accurate > measure), 3) spontaneous yawning is performed by fetuses in the womb, > but kids don't learn contagious yawns until several years after birth.
I recall a study on yawning that showed that yawning preceded a change in level of activity - eg from rest to hunting, or vice versa. Yawning was observed in lions shortly before they went for a hunt . shiv
