Alarm clocks are such an integrated part of our society that we hardly ever think about them, but it is an huge marked, and there are lots of interesting things going on. Let's have a look.

Since the early 15th century, billiard games have been popular among nobles and rich people. Today, pool and snooker are correctly recognized as a professional sport organized at an international level.

About 10 years ago, the American military gave access to the high precision positioning system. Almost the same day, a man placed a box somewhere in Oregon, and posted the coordinates on a website. Geocaching was born.

Light is a strange thing. What we usually call light is only a small part of the entire electro-magnetic spectrum. Like our ears, the eyes are only sensitive to certain frequencies of light, but there are ways to see beyond.