Ketchup is famous for being hard to get out of the bottle even when there is plenty of it left. In fact, all liquid foods—from red wine to cooking oil—leave some residue in the container. The reason ...

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You may be familiar with a common science demonstration done in classrooms: If you mix cornstarch and water together in the right proportions, you create a gooey material that seems to defy the rules ...

The following essay is reprinted with permission from The Conversation, an online publication covering the latest research. Those Transportation Security Administration requirements are drilled into ...