4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
15710 | Bohr explained the periodic table and chemical properties of elements, using the quantum atom [Kumar] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |