4 ideas
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
18202 | The concept of a field gradually replaced the substances in explaining relations between charges [Einstein/Infeld] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |
13440 | Causation is the power of one property to produce another, and this gives time its direction [Esfeld] |