The reaction from Light-Adaptationformto Dark-Adaptation formofneutral red-regenerated purplemembrane(PM)and the lightabsorptionchange of bound neutral redinregenerated PM were studied.
Because the sounds of the most closely related apes matched most closely in the analysis of the laughter, the researchers believe the work is proof of laughter's shared evolutionary origin, followed by adaptation to its form in the species we see today.
The manufacturers are also developing adaptive cruise control, which can automatically maintain a safe speed and distance from other vehicles, and intelligent speed adaptation, which can, in its most active form, prevent a driver exceeding the speed limit.