3 ms·
Radium existed but not isolated and not usable for X-Ray for example. Plane was in nature also before humans, just not assembled yet :)
by boudin 7y ago
Radium existed but not isolated and not usable for X-Ray for example.
Plane was in nature also before humans, just not assembled yet :)
- anoncake 7y agoI don't think we agree on the definition of "plane" :)