Howstuffworks "Science"

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how gravity works entered by user 6321171
how is film developed entered by user 3557253
how is pi calculate entered by user 225616
how is sperm made entered by user 7298761
how kidneys work entered by user 6612354
how lightning strikes entered by user 9287799
how might a gene pool change entered by user 2830764
how military pain beams will work entered by user 14363189
how much do traffic lights weight entered by user 5546776
how pearls are formed entered by user 5811763
how roller coasters work entered by user 2989546
how stuff works entered by user 598625
how stuff works entered by user 2996745
how stuff works entered by user 1298426
how stuff works entered by user 1391782
how stuff works entered by user 1524276
how stuff works entered by user 5952855
how stuff works entered by user 272983
how stuff works entered by user 1553949
how the blood travels through the body entered by user 3178015
how the kidneys work in the urine entered by user 6612354
how to build a spud gun entered by user 2129209
how to build a telescope entered by user 2422330
how to built a grenade entered by user 11157408
how to calculate the amount of g's entered by user 20503150
how to chose the right puppy breed entered by user 6860679
how to do hair entered by user 2626184
how to do highlights on hair entered by user 4902375
how to do highlights on hair entered by user ditto
how to get rem sleep entered by user 166896
how to get rid of weeds and posion ivy entered by user 45184
how to kill weeds not your grass entered by user 1808975
how to lighten colored hair entered by user 2278049
how to make glass entered by user 2877142
how to make light bulbs entered by user 2416053
how to make moonshine entered by user 1331981
how to open a safe entered by user 7703381
how to pop your back entered by user 16908153
how to reverse letters on a t-shirt entered by user 2548115
how to throw a grenade entered by user 2723040
how to work a squirt gun in a diagram entered by user 82463
how was oil formed entered by user 15529606
human cell entered by user 8368609
human cell entered by user ditto
human cell entered by user ditto
human cell entered by user 3566835
hydraulic loader entered by user 8700154
hydraulic motor entered by user 3909387
hydraulics entered by user 17916647
hydrogen peroxide entered by user 6411225
hydrogen peroxide entered by user ditto
hypnosis entered by user 4732530
i don't get rem sleep now what entered by user 166896
immune system colds entered by user 1064276
invisibility cloak entered by user 2554533
involute gear entered by user 3374105
iron ore entered by user 7620710
itch entered by user 742091
itching entered by user 1646643
jaws life entered by user 1659408
job goals of a crime scene investigator entered by user 4113069
kevlar body armor entered by user 9025832
kidney entered by user 4337564
kidney entered by user 14911046
kidney diagram entered by user 17386257
kidney dialysis entered by user 2704662
kidney dialysis entered by user 12788122
kidney dialysis entered by user 670554
kidney vitamin d activation entered by user 2259883
kidneys entered by user 1827278
kidneys entered by user 6108187
kidneys entered by user 11843326
kidneys entered by user 5512932
kidneys entered by user 4891773
kidneys entered by user 12810891
kidneys entered by user 9424012
kidneys entered by user 2901999
kill mosquito entered by user 2824901
lawn mower magnetos entered by user 1822075
layers of color negative film entered by user 516543
lie detector test entered by user 3672746
lie detector test entered by user 6132922
lifespan of spiders entered by user 3204436
light bulb entered by user 3961720
light microscope entered by user 12095640
light relief does it work entered by user 634149
lightning entered by user 1096121
lock picking entered by user 7982251
log splitter entered by user 5115731
log splitters entered by user 3743417
loreal hair color entered by user 12601613
lrad entered by user 4916885
luminol blood entered by user 1673328
luminol blood entered by user ditto
machine guns entered by user 1796158
machine guns entered by user 14365765
magnet propulsion entered by user 7897548
magnified glass with a light entered by user 725179
making a batman suit entered by user 11391248
making a rainbow entered by user 2585907