I know this will sound very stupid but my friend is shouting at me trying to tell me that black hair doesn’t exist. Does it exist?

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?