SSS 2011-03-07（在线收听）

This is Scientific American's 60-Second Science. I'm Christie Nicholson. Got a minute?

The National Sleep Foundation released the results of its annual sleep poll today, where they surveyed more than 1,500 people between the ages of 13 and 64.

Here are some of the interesting findings: 43 percent of Americans say they rarely or never get a good night's sleep during the week.

Nearly everyone, 95 percent, use electronics (like TV, computer, or cell phone) within the hour just before bed. Researchers caution that the use of such devices are particularly harmful to the sleep-onset process, since the artificial light can suppress the release of melatonin which is our sleep hormone.

More than half of teenagers report consuming and producing text messages every night just before bed compared to only 15 percent of those in their 30s and 5 percent of the baby boomers.

And it's these teenagers who are the sleepiest of all, with the baby boomers getting the most sleep. So scientists caution since most teens get two hours less sleep than they're recommended 9 hours, maybe an environment with fewer OMGs and ROFLs might encourage a calm wind down before bed.

For Scientific American's 60-Second Science, I'm Christie Nicholson.