Happy Valentine's Day
Love is in the air, and not just with people. We can learn a lot about evolution by studying the mating habits of crickets. The speciation rate of crickets is 4.17 every million years, which is lightning fast as these things go. Female crickets can determine a male cricket's pulse rate by his chirp, and the females breed with males whose pulse is similar to their own. That reduces the chance of interbreeding and promotes the formation of new species.