A Real Bat Computer
On today’s Creation Moments Minute, the amazing echolocation system of bats.
If you are a bat, you listen for echoes from stationary objects around you, like trees, as well as moving objects, such as an insect that is about to become lunch. Because of the differences in the movements of these objects relative to your flight, Doppler shifting changes the pitch of returning echoes. That change could place a returning echo outside the range of frequencies you are actually able to hear.
Scientists have discovered that the bat solves this problem by calculating the expected change in frequency due to Doppler shifting and then altering his squeak so that the returning echo is at the needed frequency!
Amazingly, the Creator has gone so far as to make the bat a bit of a physicist so it can make its living. What an elegant testimony to God’s wisdom and generosity!
Ref: “Bats alter frequency of squeaks to aid hunt for prey.” The San Diego Union, Mon., Oct. 23, 1989. p. D‑1. For more information about bats and echolocation, see http://science.howstuffworks.com/environmental/life/zoology/mammals/bat2.htm