display all the ideas for this combination of texts
4 ideas
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
17394 | Natural kinds are what are differentiated by nature, and not just by us [Scerri] |
17421 | If elements are natural kinds, might the groups of the periodic table also be natural kinds? [Scerri] |
17396 | The colour of gold is best explained by relativistic effects due to fast-moving inner-shell electrons [Scerri] |