As with many things (such as electric cars), the problem is in developing batteries that are small enough and strong enough to power the electronics for any period of time. The Palm computer you spoke of still requires a handful of batteries. Miniaturizing electronics is not a big problem -- you're just directing electrons around and they're small. Generating significant amounts of energy with a small mass...? Now you're limited by thermodynamics. On topic, there are two nests with Am. Goldfinch incubating eggs in Bradford Pear trees along the parking lot and entranceway here where I work in West Knoxville. Dean Edwards Knoxville, TN =================NOTES TO SUBSCRIBER===================== The TN-Bird Net requires you to sign your messages with first and last name, city (town) and state abbreviation. ----------------------------------------------------- To post to this mailing list, simply send email to: tn-bird@xxxxxxxxxxxxxx ----------------------------------------------------- To unsubscribe, send email to: tn-bird-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Topographical Maps located at http://topozone.com/find.asp * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Visit the Tennessee Ornithological Society web site at http://www.tnbirds.org * * * * * * * * * * * * * * * * * * * * * * * * * * * * * TN-Bird Net Owner: Wallace Coffey, Bristol, TN jwcoffey@xxxxxxxxxx (423) 764-3958 =========================================================