1. Websters says:Darkness (n) is the absence of lightModern Physics says Light is:- a particle = photon (and/or)- a wave = probability wave- has mass (or at least electro-mass)- travels at 186,282 miles/sec (300,000 km/sec)- measures distance (light year = 10,000,000,000,000 km)So where isnt Light (=darkness)?- empty space? (between galaxies?)- in black holes? (cuz theyre black?)Lehman Cave, Great Basin NP, NV- underground! (caves and mines!)

2. Whats Darkness Anyway?Anatomy saysLight is the medium for visionAdverted Vision- ~200 photons/sec per rod- >150,000 rods/mm2 (Human retina)- >1,000,000 rods/mm2 (Great Horned Owl retina)So darkness is Varying shades of gray? 3. Whats Darkness Anyway?Math says 1/15 sec refresh rateLights intensitydiminishes at: S 4r2So darkness isVery Dispersed light? 4. Darkness is Noisy! So darkness sustains: - Almost all amphibians - Innumerable insectsMoth - Most mammals - Frequently fish - Bunches of birdsOwl FishLion Frog 5. 9000 88828000700060005000400030002973 2000 1000965 03 7 35 95 305 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.02.0 Visual Limiting Magnitude(Urban Center >2 million) 6. 9000 88828000700060005000400030002973 2000 1000965 03 7 35 95 305 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.03.0 Visual Limiting Magnitude(Urban Center ~1 million) 7. 9000 88828000700060005000400030002973 2000 1000 03 7 35 95 305 965 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.04.0 Visual Limiting Magnitude(City ~100,000) 8. 900088828000700060005000400030002973 2000 10003 9657 35 95 305 0 0.0 1.0 2.0 3.0 4.0 5.0 6.07.06.0 Visual Limiting Magnitude (Town ~10,000) 9. 9000 88828000700060005000400030002973 2000 10003 9657 35 95 305 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 7.0 Visual Limiting Magnitude (National Park / Village