Halloween now sits second to Christmas for the greatest American holiday spending. In the past decade halloween lights have moved beyond candles in pumpkins. Serious outdoor displays have emerged - they're not as large/garish/expensive as the Christmas displays, but give them time...
telomeres are tiny caps found on the end of DNA strands, like plastic aglets on shoelaces. They are believed to protect the DNA from damage during cell division and replication.
As a cell ages, its telomeres naturally shorten and fray. But the process can be accelerated by obesity, smoking, insomnia, diabetes and other aspects of health and lifestyle.
In those cases, the affected cells age prematurely.
However, recent science suggests that exercise may slow the fraying of telomeres. Past studies have found, for instance, that master athletes typically have longer telomeres than sedentary people of the same age, as do older women who frequently walk or engage in other fairly moderate exercise.
Roundabouts are an efficient form of intersection .. unfortunately they can be confusing and the source of accidents. The Dutch have a superior variation known as the turbo-roundabout that dates back about 25 years and now is common in the country. The trick is to make drivers choose their direction before entering the roundabout - better explained with a video:
The fastest economic growth in the world is taking place in Africa. Much of the region's infrastructure is between terrible and non-existant. Rural regions are often without electricity and areas with it oftne use piano wire and chewing gum quality technologies. Expecting centralized utilities to enter and bring services that are affordable is a dream that is unlikely to happen anytime soon. But solutions exist. A piece on microgrids in rural Kenya.