A paper in Archives of Disease in Children documents a New Zealand experiment in which children's sleep habits were tracked against their activity, as measured by an actigraph. The conclusion won't surprise many parents: kids who run around all day sleep more at night (and kids who sleep more at night are more apt to run around all day).
The study included 519 healthy 7-year-olds from New Zealand, who each wore a device called an actigraph for 24 hours. An actigraph records movement, providing an objective measure of a child's activity level and sleep time. Parents also noted when their child went to bed, which allowed researchers to calculate how long after bedtime children actually fell asleep.
Active days mean better bedtimes
The researchers found a wide variation in how quickly children fell asleep, with some taking as little as 13 minutes and others needing more than 40 minutes after going to bed. Within this range, there was a close relationship between the onset of sleep and daytime activity. On average, children took an extra three minutes to fall asleep for every hour they weren't moving about. Also, the children who fell asleep faster slept longer overall. On average, children got one extra hour of slumber for every 11-minute drop in how long they took to get to sleep.
Periodic Stats is a dead-easy web-based Periodic Table to click around, showing all the stats and the history of each element. The only thing missing are illustrations of each one! [via Reddit]
To demonstrate the Magnus effect, YouTuber PeterSripol grabbed a couple of KFC buckets and tricked out an RC plane. The resulting trial and error is mostly the latter.
One of the weirdest places in Antarctica is Blood Falls, a five-story cascade of blood-red liquid pouring from Taylor Glacier. Researchers finally traced its source: a saltwater lake millions of years old trapped under the glacier.
Bamboo has lots of uses beyond just being panda food. Things like bikes, roads, scaffolding, and musical instruments are made from the fast-growing grass. But unless you are participating in a tropical-themed LARP, you probably wouldn’t want a shirt made from bamboo stalks. So why do bamboo bed sheets make any sense? Because yarn extracted from […]
If you want to work in tech, but don’t have any desire to code web apps to help businesses sell things to other business, you might want to consider a career in cybersecurity. Judging from the apparent complete infiltration of Russian hackers in American cyberspace, it seems fair to speculate that there’s a major shortage of […]
All moms are different. But all moms like getting flowers on Mother’s Day, and that’s a fact (not, however a fact we can document in any fashion.) Instead of getting chewed out for forgetting to call her on the second Sunday of May, you can take care of it ahead of time with Teleflora’s flower […]