Activity for Cygnus X-1‭

Type	On...	Excerpt	Status	Date
Question	—	Assuming a flat world and no obstacles, how far could you see? I know this question has been asked in similar places, but I'm after a specific part of the problem. Assuming the following: Perfectly flat, infinite world Earth's atmosphere Sun directly overhead of the viewer, no matter the time or location No obstacles How far could a human see in all directio... (more)	—	almost 5 years ago
Question	—	Crop production in mountains? Would potato- or grain-like crops be able to flourish in northern alpine regions? There's a lot to be said about the Andeans, but the have the benefit of living near the equator that other civilizations do not Considerations: - 8-12 thousand feet elevation - Steep, primarily granite mountains - High... (more)	—	over 5 years ago