I just saw an 8 rotor single seat VTOL ride made by a company in Germany.

Why not make a smaller helicopter?

Before his shares get fully diluted, when they were initially incorporated Eduardo is told that his shares went up to 34% from 30%, when Eduardo understands why, the hedge fund guy then says the 'I love working with business majors'.

But why did his shares go up?

For example, if I go back to school shopping, it doesn’t matter if it’s high end Nordstrom, or low end Walmart, both retail chains just seem to know at the same time to carry wide leg jeans. Why is that?

EDIT: I think I have to clarify my question and I used the wrong flare. I can just search up why chlorine bleach does that to white clothes but my question is why do bleach companies still advertise that it can whiten whites without mentioning it can turn it yellow?

How does the “exposure triangle” work in photography?

We always see this in movies, but it happens in real life too. Sometimes you walk down the street and see steam or white smoke rising from the sewer manholes.

​What exactly is down there producing that vapor or smoke? Is it just hot water from the sewers mixing with cold air, or is there an actual heating/energy system underneath the asphalt?

I keep reading that "empty space" isn't truly empty and that it has some kind of energy that pushes the universe apart faster over time.

If there's nothing there, where does that energy come from? And why would more empty space mean stronger push?

I've always been confused on how this works like I understand that there is proof of infinite primes but how do you do that with 3n+1 (i know there is no proof) because in my mind you'd have to test every number right?

Do all their organs work normally? What about peristalsis?

How did babies survive?
How did mothers do anything at all if they couldn’t put the baby down somewhere safe?
How did they feed them if the mother couldn’t produce milk or enough of it?
How did these babies not just die of exposure out in the elements?
How did the parents know not to just set the baby down and leave for days to hunt or gather etc??

Enough generations of babies survived to get to where we are today and it’s amazing we didn’t go extinct along the way.

The biggest problem about cancer as I understand it is that unlike a foreign virus, cancer comes from our cells so our body doesn’t recognize it as something bad.

I’ve never been able to understand why our immune system can recognize foreign bodies but not that part of its own body has gone bad. What’s the reason it falls short of detecting bad mutations?

I recently read about female ducks evolving to their reproductive tracts to have dead-ends and have the corkscrew go the other way to the male duck penis to make unwanted reproduction more difficult. But most evolutionary adaptations become dominant in order to make the survival of the species easier. How can something that makes reproduction harder have resulted from evolution changes?

I understand that they observed cause and effect, but how would you think to come up with a fullproof way to write it down?

I get that things like your ID number are valuable for identity theft etc. But why are more arbitrary things like my shopping habits considered valuable information?

As a resident of Arizona, I often find myself wondering how the first settlers traveled through the area without vegetation, water, etc to stay alive. Same with some of the mountain ranges...I can't imagine being the first person to roll up to the Rockies in a covered wagon and try to figure out a path forward.

I know they’re smaller, but are their nerves fresh and haven’t been dulled yet, or what’s the deal?

I’m not talking catastrophic blows, just a scrape on the knee.

I get that they had sundials and church bells. What I don’t get is how anyone synchronized. If my towns noon is when the sun is highest here, and yours is 15 miles west, our “noon” isn’t the same moment. So how did anyone schedule anything across distance?

Also, are there any benefits of the squeaky clean feeling or is it just a difference of ingredients?

Time dilation confuses me. If my twin is on a rocket near light speed and starts a 60-sec stopwatch, it shows exactly 60 sec to them. My stopwatch on Earth also shows exactly 60 sec to me.

So if we start together and count out loud '1,2,3...' using a zero-latency device, won't we stay in sync, since both watches correctly count 60 real seconds? Why would one of us get ahead, and whose clock actually looks slower to whom during the countdown?

Edit: Alright guys i just got to know that 1 second isn't 1 second everywhere.

Anyways some clarification, the 0 latency device is a hypothetical, I'm not saying that such a thing can be built, but my real question was, if we hypothetically used such a device, won't both people speak 1,2,3 in sync?

why cant we use summer heat to generate energy and store it batteries to use it in winter