What happens when you light a match in space? Astronauts reveal the stunning blue flame mystery

Chinese astronauts aboard Tiangong station witnessed a match flame transform into a blue sphere in microgravity. Unlike Earth ...

8 best kids’ toothbrushes they’ll actually want to use

The NHS recommends using a children’s fluoride toothpaste containing no less than 1,000ppm of fluoride. It’s also important ...