If there were two moons?...

Well the tides would change drastically.

Everything would be backwards, I’m not positive but I watched a documentary on this back in like 800 BC. It was an amazing film. I wish I knew the name. Jeeze I’m not much help. Lo siento

All it would affect or at least noticeably affect just the tides which more than one moon could either lessen or amplify the tides (it would either cancel them out or add them up) Seasons would not be affected by moons, they are affected by our rotation around the Sun and our tilt on the axis. Unless the gravity of the two moons tugged on the Earth and skewed its tilt somehow then we would have seasonal differences and temperature differences. As far as biology goes there is no scientific theories that our biology is affected by the moon.

“As far as biology goes there is no scientific theories that our biology is affected by the moon.”
what about the countless coral and fish that spawn in accordance with the moons cycles?

@uberbatman good one, I did say our biology though…yes there are corals and fish that spawn due to the cycle of the moon. As far as sea life goes it could and probably would be affected by us having two moons. I guess though if you think about it long enough though one could assume the two moons were always here and if we evolved from the ocean, theoretically we could be completely different than what we are now.

@earthduzt ah didnt realize you were specifically talking of humans. I do agree with you though about the evolution of things just being different.

Let’s see… With one moon there are only 2 truly dark nights per month. so call it 1 out of 14 nights. With a second moon in the sky, located in a different orbit about the same as the iesiting one we can expect to see about the same motion . Therefore we would have a truly dark sky every 1/14×1/14 days or 1 in 200 days.
A developing tribe might worship such a rare event since it would appear about twicea year: winter/ summer. or spring /fall. They might burn branches to light he sky. The might be surprised at the number of stars in the sky and decide they were ancestors. I could go on…

Night creatures would not be as plentiful since they would only be safe from predators twice a year instead of once per month. You might find one small critter that only eats and mates during those times. It would go into hibernation during the intervening months.

The NASA program budget would be twice what it is today to fund fund landing on both moons. China would establish have a base on the second moon.

They say, the moon has a gravity effect that causes the tides to become high or low. To say if it would be a factor whether it would b the cause of effect on spieces seems to be reasonable. To humans, it would have an effect on art and literature, for moon has been conotated as something as being a symbol of romance. So would it still be special if it were to be two moons present. Maybe the landing of the moon would not be that special, if it were two moons? History would definitely change obviously.

How big is the somewhat closer moon?

The lunar calendar would look a lot different. Since that was the calendar for a few thousand years, you’d be looking at a profound but perhaps insignificant change.

@mattbrowne lets go with somewhat larger than our existing one
@worriedguy i like you answer i’m guessing you found a source or calculated that yourself
also, I’m sure biology would change somewhat too, and maybe affect the way certain species adapt to their environment, like @worriedguy said, maybe a diffrent species of night critters, and also maybe different sea creatures as well…?

A larger one aligned with the existing one and the sun create huge spring tides.

That would mess up the tides. I think it would affect it more or less depending on where the other moon was in the orbit.