Activity for thelefthorseâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
What gases could be present in a viable atmosphere for humans? I'm working on a story involving humans looking for another habitable planet, and I have been scouring the net for days, finding lots of info on varying levels of oxygen and nitrogen, but none that really answer this question: Earth's atmosphere is a mix of oxygen, nitrogen, argon, carbon dioxide an... (more) |
— | over 5 years ago |