Willebrord Snel (1580â1626) Netherlands. Although he discovered the law of refraction, a basis of modern geometric optics, in 1621, he did not publish it and only in 1703 did it become known when Huygens published Snell's law in Dioptrica..
MKDS: Heavy. R.O.B. (short for Robotic Operating Buddy) is an accessory for the Nintendo Entertainment System who has recently made appearances in a few Mario games. In Japan, it was known as the Famicom Robot, which was short for Family Computer Robot.
MKDD: Medium. MKW: Medium. Birdo is a starter character in Mario Kart: Double Dash!! and an unlockble character in Mario Kart Wii. can be unlocked by playing Time Trials on 16 different courses at least once, playing 250 VS matches in online games, or playing 1,350 unique races.