Now you know

Contrary to Internet rumors, a duck's quack does echo - but it may not echo very well. Echoes occur when sound waves reflect off hard surfaces. Higher-frequency sounds reflect best, resulting in better echoes. Depending on the species of duck, its "quack" may lack high-frequency components - so the echo may be very faint.

(c) Copyright 2001. The Christian Science Monitor

We want to hear, did we miss an angle we should have covered? Should we come back to this topic? Or just give us a rating for this story. We want to hear from you.