How Do We Define the Kilogram?

Brown recluse spiders rarely bite humans, and when they do, it only causes a reaction in about 10 percent of cases. Learn how to identify brown recluses and what their bites do in today's episode of BrainStuff, based on this article: https://animals.howstuffworks.com/arachnids/br ...  Afficher plus

Voting is an incredibly important way to make your voice heard, but it's very rare for a candidate to win or lose by just one vote. Learn how rare -- and about a few times that it's happened -- in today's classic episode of BrainStuff, based on this article: https://people.howstu ...  Afficher plus

In today’s story, which originally aired in 2014, we meet a very special cylinder. It's the gold standard (or, in this case, the platinum-iridium standard) for measuring mass. For decades it's been coddled and cared for and treated like a tiny king. But, as we learn from write ...

What's the smallest piece of matter? Is there one? 

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How much is a gram? An ounce? Or a ton? If you don't have an intuitive feel for exactly how much mass these quantities represent, keep on listening! Read the full transcript here: http://bit.ly/2dWyR0G Hosted on Acast. See acast.com/privacy for more information. 

For most of us, the calorie is just a number on the back of the packet or on the display at the gym. But what is it, exactly? And how did we end up with this one unit with which to measure our food? Is a calorie the same no matter what type of food it comes from? And is one calor ...  Afficher plus