Benefits of recycling your used rockwool.

[American Beauty Gardener]

We found this interesting factoid showing the benefits of recycling
your rockwool.

Rockwool is made from basalt limestone; a major benefit it has is
it's ability to be chopped-up after it has been used and added to your
outdoor gardens to aerate and buffer the Ph of your soil and compost
bins. This snippet shows how the limestone from ancient temples
actually grows healthier and helped scientists find ruins from the
enhanced vegetative growth around limestone temple sites!

Story from Slashdot 01/10/08

http://science.slashdot.org/article.pl?sid=08/01/07/1557216&from=rss

When NASA's only archaeologist, Tom Sever, looked at an infrared
satellite image of a Mayan city in Guatemala, he was intrigued to see
the vegetation around the buildings showed up as much brighter than
the vegetation in other areas. Following a hunch, Sever, based at the
Marshall Space Flight Centre in Hunstville, Alabama, looked for other
patches of bright vegetation on the U.S. space agency's maps.

Sure enough, he found additional bright spots at sites not previously
considered for archaeological digs.

Sever hypothesised that the limestone that the Maya used for building
had leeched into the soil, altering vegetation at these sites. Since
chlorophyll in plants glows brightly in the infrared range, NASA's
satellites were able to pick up the subtle difference in vegetation.
With this new method in their toolkit, archaeologists went on to
discover several previously unknown Mayan cities.