You will notice that when the indicator is added to the lemon juice, the solution turns red, which indicates an acid. Washing powder is an alkali, so it turns green when the indicator is added. Baking ...

Pack into the clean jam jar and pour in the vinegar, plus any extra to half-fill the jar. Top up with water so that the vegetables are covered, seal with a lid and shake to combine. Leave to stand ...

After authoring his best MLB start a week ago, Astros right-hander Spencer Arrighetti gave up seven runs in four innings against the Blue Jays on Tuesday night.

View the latest Integral Ad Science Holding Corp. (IAS) stock price, news, historical charts, analyst ratings and financial information from WSJ.

John is Ars Technica’s science editor. He has a Bachelor of Arts in Biochemistry from Columbia University, and a Ph.D. in Molecular and Cell Biology from the University of California, Berkeley.