Activity for kexx‭

Type	On...	Excerpt	Status	Date
Question	—	Could a civilization invent space-faring technology on planet that mostly lacks any kind of metals? Imagine a species that evolved on a planet where there was no metal (or not much) of any kind. They, of course, discovered fire and were able to start building buildings and basic machinery from wood. Later their technology changed and became biology focused with a strong knowledge of DNA manipulat... (more)	—	about 10 years ago