Carbon dioxide can indeed be poisonous in high concentration but it's ridiculous to call atmospheric carbon dioxide poisonous because those concentrations just won't cut it. Yet. This is, of course, independent of whether atmospheric carbon dioxide is a pollutant (as in a substance with a harmful effect on us, other…

Strip any science down to its roots and you get...physics. It's easy. Every scientist's a physicist, the rest is a matter of specialization.

At the very least the "Rebels" don't seem to operate any aircraft, making air defense a low priority in that war. Doubly so for planes flying west to east.

...scattering debris all over the landscape...

Damn you! You ruined my rhetorical question.

The cat seems happy, at least. Even after curiosity killed it, apparently, in this video.

What for? Isn't the show enough (for his state of mind back then)?

Huh? What about all those troops in the Crimea? Tanks to the rebels? And that's just the most obvious examples. No way Putin would not interfere - though in the end, it might not exactly be what the Russians in Donetsk hope for.

Always make sure that whatever you really want to destroy can't be separated from your bomb. Then make sure destruction of electronics means detonation, not deactivation.

Laser guidance would probably not work. But that seems like a poor reason to coat your targets in this stuff. As for wavelengths, size matters and what works for visible light needn't work (and, generally speaking, probably doesn't except maybe for metallic reflection) for much longer or shorter wavelengths.

It would seem carbon nanotubes appear black/grey but may also show a variety of colors. That's what Google spits out when asked for the color of carbon nanotubes, at least.

I don't think the blackness extends to the entire spectrum (including radio wavelengths) and for visible spectrum stealth at least, blackness is useless. The material is most definitely not laser resistant. it absorbs almost all light meaning it would be among the best possible materials to be heated by a (visible…

That would be cool but I really don't think it is.

It helps that bear bites rarely go unnoticed for days.

Is that a 'Yo material so black' joke? Are those a thing now?

Best use I can think of is in optics. Then again, I don't think like DARPA.

Then again, it might be cheaper to make lights out camo in actual camo color (dark blue and dark grey are hard to spot outside at night while in unlit buildings anything works that looks somewhat like the walls). In total darkness you can wear pink and still not be seen, don't need (near-) perfect black.

Looks cool but this can't be good for the bearings. Then again, just make them big enough...

Good answer. But doesn't it even take the Star Trek universe well into the 21st century to start getting there (then again, not sure when they came up with that timeline)?

Which do you mean? Pacifistic future or directed energy weapons?