163K views · 2.5K reactions | A voltage tester is a great tool to have in your toolkit. Heath Eastman shows Kevin O'Connor how to use a few different models and explains why having one is important.  | This Old House | Facebook

31K views · 486 reactions | Did you know that putting on your sunglasses is one of the ways to protect your eyes from cataract ? Learn about ways to protect yourself from UV radiation from Dr Cornelia Baldermann, Scientific Senior Consultant, at the German Federal Office for Radiation Protection. Dr Baldermann explains where UV radiation comes from and how it impact our health in Science in 5. | World Health Organization (WHO) | Facebook