Vacuum chambers are devices that let you manipulate the amount of air inside them. This YouTuber puts 30 marshmallows inside a chamber and records how they react to the changes in pressure. Even if you know what’s supposed to happen, it’s really interesting to watch. Press play to see how air pressure affects these fluffy treats.
Stop robocalls once and for all
Robocalls are not only annoying, but they scam Americans out of millions every year. Learn Kim's tricks for stopping them for good in this handy guide.