Bridges are built to last a very, very long time, and the simpler you make them the longer they will last.

A sloped bridge is going to have an uneven distribution of force. One end will be more affected by its own weight than the other. That's not good for longevity.

Consumer 3D printers print shitty plastics. If you ever want a strong plastic, or god forbid a metal piece, or GASP silicon, you're out of luck.

No you can't print a 3D printer. And never will be able to. All they can print is 100% shitty plastic. 50s tech basically. As soon as you encounter metal or worse you need a silicon chip, that's it. You go outside.

It may not be. Chicxulub is absolutely massive but not visible from a normal satellite. It's been eroded by time. When you consider just how gargantuan that planet killer was, it gives erosion and plate tectonics a much stronger argument.

It wasn't even that long ago from a planetery age viewpoint, given its size.

Mold is life. Life grows where there is water. Humidifiers dump tons of water in their general vicinity. It's a natural consequence of humidifiers.

As noted by the other person there are ways to get around it by making the humidifier itself out of materials that kill anything that it touches, but those materials are almost never safe.

Copper would probably be the least concerning from a health standpoint, but copper is not cheap, and it's really heavy.

It's way more practical to just ask you to scrub it every once in a while.

No, no I didn't. This sub isn't literally for 5 year olds.

The US did have full body x-ray machines post-911. The name for them was backscatter. They did cause increased cancer rates, because they were ionizing radiation.

The priority back then was on airplane safety. 911 did some really weird shit to American society, including authorizing a mass indefinite detention and torture system. Back then waterboarding was being debated in civil society as a humane way of extracting information.

Famous intellectual Christopher Hitchens infamously aligned himself with the rightwing neocons and thought that waterboarding wasn't torture and that it wasn't a big deal. He agreed to have himself waterboarded to put his beliefs to the test, and immediately after 1 waterboarding session lasting just seconds he flipped his mind and started calling it torture. He was one of the only people ever to to try it, and it must have changed at least some minds in broader society.

If you weren't around back then you wouldn't really understand. The country lost its marbles entirely. You'd think America was normal prior to Trump, but no it wasn't.

I don't know if they're still in service today, but it's always worth asking.

https://en.wikipedia.org/wiki/Backscatter_X-ray

Here's the video of Hitchens agreeing to being waterboarded.

https://www.youtube.com/watch?v=4LPubUCJv58

The hard science tells us these artificial sweeteners contain 0 calories, and 0 anything else. It's purely taste and no harm of any sort. That's the hard truth. They are 0 calories sweeteners, and there are no hidden calories in them. You'd die trying to survive off 0 calorie foods. There is no disputing that.

With the hard science out of the way comes the dilemma of separating bad data humans provide, with any sort of response from the human body. We can obviously taste sugar. There's a chance our bodies respond the sweet taste some way. Maybe the taste makes us more hungry. In evolutionary terms it's not the most stupid idea if you think about hunter-gatherers a few hundred thousand years ago.

But that is speculation only. It's possible that it's all bad data and that artificial sweeteners do nothing at all. We just don't know. We need more data on the subject.

Your question can't be answered. We don't know. It's an ongoing point of research.

The energy needed to initiate fusion is far too large to just have it happen on its own. You can't do it in a bomb, so there's no such thing as a fusion bomb.

Hydrogen (aka thermonuclear) bombs get the energy needed to start the fusion reaction by setting off a fission reaction first, so they're fission-fusion bombs. It's called the Teller-Ulam design, named after the two physicists who came up with it.

https://en.wikipedia.org/wiki/History_of_the_Teller%E2%80%93Ulam_design