ed imates doo 100 million years, to 50 million years, and finally, in 1897, to a mere 24 millionyears. Kelvin  being   t couldexplain inuously for more tens ofmillions of years at most  exing its fuel. t follo tsplanets ively, but inescapably, youthful.

    t nearly all tradicted teentury t of fossil evidence.