1 Kepler's Task. 2  Accurate Data. 3  Shape of the Path. 4  1. Planets move in ellipses with the Sun at one focus. 5  2. The radius vector describes equal areas in equal times. 6  3. Squares of periodic times are to each other as cubes of the mean distances.
So how fast do the average adult's nails grow? The simple answer is that fingernails grow about one-tenth of an inch (3 millimeters) a month. If you lose a fingernail, it will take four to six months to regrow completely. Toenails take a year to a year and a half to grow from cuticle to tip [source: Robb-Nicholson ].
Thus, in humans, the nail of the index finger grows faster than that of the little finger; and fingernails grow up to four times faster than toenails. In humans, nails grow at an average rate of 3 mm (0.12 in) a month. The longest female nails to ever exist measure a total of 601.9 cm.