Landsat’s data archive allows us to trace the life history of each spot of land. thumbnail: http://svs.gsfc.nasa.gov/vis/a000000/a004000/a004013/landtrendr_agu35.08000_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