How Can You Instantly Guess Someone s Age?

Is there a way to tell how old someone is without asking? One key indicator is a person s hearing abilities. UPDATE: The mosquito tone in this video was lost during processing after upload. To check out your ability to hear high frequency "mosquito tones" check out these sites: http://www.audiocheck.net/audiotests_mosquito.php http://www.freemosquitoringtones.org/hearing_test/ Subscribe to Science Channel: http://bit.ly/SubscribeScience THE QUICK AND THE CURIOUS http://www.sciencechannel.com/tv-shows/the-quick-and-the-curious/ Check out Mark Rober s YouTube channel: https://www.youtube.com/user/onemeeeliondollars Check out SCI2 for infinitely awesome science videos. Every day. http://bit.ly/SCI2YT Download the TestTube app: http://testu.be/1ndmmMq