Activity for supercatâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Answer | — |
A: Is it OK to throw pebbles and stones in streams, waterfalls, ponds, etc.? Some places have rocks on the shore that arrive there naturally. The effect of a few dozen people per mile people picking up a rock from random locations uniformly distributed along a moving river would be trivial compared with the motion of rocks in and out of the water from natural causes. A poin... (more) |
— | over 5 years ago |