In 1897, Amos Dolbear discovered that one could tell the temperature by listening to the number of cricket chirps in 15 seconds and adding 40 to get degrees Fahrenheit. Dr. Peggy LeMone in 2007 found that counting the chirps in 13 seconds and adding 40 gave more accurate results. This clip uses the Old Farmers Almanac compromise of counting in 14 seconds and adding 40. Cricket stop chirping when the temperature is below 55 F. Listening to cricket outside can be like listening to a choir of random chirps. However, this observatory allows kids to easily rediscover the cricket temperature phenomena with isolated male crickets.