Question from Joe McKinley The first recorded use of roller skates was in the 1760s, when Belgian-born John Joseph Merlin decided to demonstrate his new invention at a fancy masquerade party in London. After donning his inline skates...
Question from Phoebe Sims A superfast camera is an electronic device that uses a charge-coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) active pixel sensor. The sensor is so sensitive to light that...
(Image credit: Maarten Takens) Question from Naomi Isles We’re all familiar with the poles of our planet – the northern and southernmost points according to the spin of the Earth and the position of...
Question from Louise Peacock Weatherproof garments are made by sandwiching together different layers of materials. The outer layer is normally a tightly woven fabric, such as nylon or polyester, combined with a membrane. A...
Question from Cassie Yelverton Ballet dancers perform with perfectly pointed toes using shoes that have solid blocks built into them. While this may look elegant, balancing on the tips of the toes puts enormous...
Question from Kelly Olsen Dark and milk chocolate both contain cocoa solids, cocoa butter and sugar, but as its name suggests, milk chocolate also contains milk in the form of milk powder, liquid milk...
Question from Peter Reeves This is known as an afterimage, and is caused by the effects of the light on the cells in the back of your eye. Your eye detects light using specialised...
Question from Kevin Watson Tudor England was generally selfsufficient, not needing to rely on imports. People ate a lot of fresh food because storing food was difficult. Even peasants had small pieces of land,...
Question from Eduardo Raffaele Like us, animals carry microbes, most of which live on the skin or in the digestive system. Whole cuts of beef tend to be safe to eat rare because their...
Question from Hannah King According to recent research, the best time to start learning a language is before the age of ten. There are three reasons for this. First, children have more time to...
