26 votes
Accepted

How fast does a pineapple need to fly to kill?

I'm going to disagree with the other answers (even though they are good answers). The reason is because of 'Beanbag rounds' - these are less-lethal rounds fired from a Shotgun for riot control and ...
  • 6,724
12 votes
Accepted

Could gene therapy become the new plastic surgery?

No At least not anytime in the near future. And even then... Most of what you want is simply just not possible thru "genetic surgery". Crispr (Gene editing technology) Can replace DNA inside ...
  • 999
10 votes

How fast does a pineapple need to fly to kill?

Any reasonably hard and heavy object hitting the head has the potential to kill, either directly or by causing the victim to fall and get more injuries. A coconut may be slightly harder, but it can ...
  • 106k
7 votes

Could gene therapy become the new plastic surgery?

The fundamental problem here is that genes are only templates used by cells to make things. You can't write "blue walls" on your house plans and then have blue walls; you can't sketch some ...
5 votes
Accepted

Carbon planet gardens

You are focused on the wrong details As a general rule, evolution will care more about your environment than your building blocks. If an organism has the capacity to evolve and adapt to its ...
  • 75.7k
5 votes

Could gene therapy become the new plastic surgery?

Semi-hard no on this. You have to differentiate between genotype and phenotype. Genotype is what's in your nuclei, and phenotype is what that code builds. Gene therapy can change what's in the nuclei, ...
4 votes

How fast does a pineapple need to fly to kill?

About 100 mph. Google says Mike Tyson can punch you in the face with 1600 Joules. This will probably kill your average Joe Schmoe if they are not prepared. The pineapple is mostly water. Mike Tyson is ...
  • 60.5k
4 votes

How fast does a pineapple need to fly to kill?

As you mention, a pineapple to the head is much like a potato to the head. (Wise words). It turns out that potato cannon injuries have been studied as they relate to the speed, weight, and diameter of ...
  • 4,241
4 votes

Could gene therapy become the new plastic surgery?

As others have said, this is essentially impossible with gene therapy technology. Ignoring the problems of knowing whether a gene will work as intended(or at all) in a human, the genes have already ...
3 votes

Could gene therapy become the new plastic surgery?

No We have no idea how to change height or skin colour by altering the genetics of a living animal. We know some stuff about modifying embryos. But I suspect we are not even much good at modifying rat ...
  • 60.5k
3 votes

How can I have normal density matter in higher dimensions?

It Affects Everything Equally In higher dimensions, your hypercube of flour from the hypermarket weighs less than it would in boring old 3-space. But you also weigh less. You are less strong and the ...
  • 60.5k
3 votes
Accepted

Is it possible to date this object?

As you say, they're artificial, so in theory they could have been made to mimic practically any measurable property. So in that sense it is impossible to date them with any accuracy. However. Assuming ...
  • 176
2 votes

Plausible evolutionary path from modern birds to "dragons"

Arid climate Which, funnily enough, could push a vulture closer to a stereotypical European dragon of legend in every way. There's a few main factors at play here: High tempuratures Water scarcity ...
2 votes

Bidirectional engineered rivers for long distance non-self-propelled boats

Has anyone used this proposed system before? If so where and when. If not why not? Because digging and supporting long canals is prohibitively expensive. And quite pointless too. Towns form in places ...
  • 444
2 votes

How fast can a cylinder spin, with a human on its inner wall, to NOT experience motion sickness?

https://en.wikipedia.org/wiki/Artificial_gravity: It is generally believed that at 2 rotations per minute or less, no adverse effects from the Coriolis forces will occur, although humans have been ...
  • 444
2 votes

Conditions for my tower to be above the clouds

In wet/rainy weather, the cloud deck can be as little as 500 feet (~300 meters) above sea level, though it can be two or three times that thick. That means any tower as tall as the Empire State ...
  • 44.4k
1 vote

Could fire use chemicals other than oxygen as fuel?

Oxygen has no unique properties when it comes to conventional fuels. Oxygen is used because it is so reactive (no gimmicks needed to make it react) and it is so abundant on this planet (easy to obtain)...
1 vote

How can I have normal density matter in higher dimensions?

Option 1: The closeness of things in 3-d is an optical illusion. The only way for a lower dimensional thing to exist in a world where more dimensions are real is if the things that exist in the lower ...
  • 75.7k
1 vote

Conditions for my tower to be above the clouds

First, I want to point out that atmospheric conditions vary wildly, even in the world's most consistent climates. The Atacama desert, the driest place in the world, often gets fog from the Pacific ...
  • 11
1 vote

Aerial Combat in a High-Pressure Atmosphere

The speeds would be lower, altitudes higher, and there would be more planes without swept wings. Think of lift and drag this way. Doubling airspeed causes 4x drag and lift. So, with 4x density you get ...

Only top scored, non community-wiki answers of a minimum length are eligible