This week’s lesson I learned from one of my nine-year-old students, who learned it on a field trip he was very excited to tell me about: if you count the seconds between a cricket’s chirps, you can tell the temperature.*

Crickets are cold-blooded. Because they’re insects. And, as the temperature increases, it allows for more frequent initiation of the chirp mechanism. Think of it as operating the same way heartbeats do in cold-blooded creatures. Because science knows by how much each degree of temperature increases the cricket’s ability to chirp, it also knows how to gauge temperature from the rate at which the cricket chirps.

The actual figuring takes some effort, but here’s how to do it with degrees Fahrenheit.

Step one: Find a cricket.

Step two: Count the number of chirps the cricket makes over a 14-second span.

Step three: Repeat the second step twice more and average the numbers.

Step four: Add 40. This is the temperature.

To ascertain the temperature in degrees Celsius because you live in a sane country that uses the metric system, follow these steps:

Step one: Find a cricket.

Step two: Count the number of chirps the cricket makes over a 25-second span.

Step three: Repeat the second step twice more and average the numbers.

Step four: Divide by three, and add four. This is the temperature.

Disclaimer: this information is accurate only between 55-100 degrees Fahrenheit/12-38 degrees Celsius.

More here and here.

*In this situation, you have been separated from your phone. Or are hiking with no reception. But you have a stopwatch on you.

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