Flyover the Eastern US, highlighting areas of forest loss, 2005-2010. thumbnail: http://svs.gsfc.nasa.gov/vis/a000000/a003900/a003953/MtMining_still.08900_gal.png

STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by