Curiously, though, we don't really know it is coded in DNA.
Michael Levin has been discovering lately that biology is more complicated than we thought. His YT videos are mind-boggling. Flatworm genetics are a dog's breakfast that the cells work around by means nobody understands.
Strontium-90 has advantages. At density 2.6 vs 12, you can afford to loft more of it to compensate for its 28y half-life, and still come out ahead provided you can dispose of the extra heat at first. Few missions need to run decades.
Arrayed as a thin film on a substrate, you can use the kinetic energy of the alpha particles directly for thrust. The substrate will need to dissipate some heat from nuclei emitted in the wrong direction.
Those use strontium-90, which decays much faster than americium-241. That makes it hotter, at first, but its useful life is less. Being more than 4x less dense, you might carry enough more to make up the difference (and discard the extra heat, at first) if you have the room.
Strontium-90 decays by beta emission, ending up as stable zirconium, meaning you don't have to vent helium.
The doesn't say whether the C-145As built in Poland for the US Air Force still had the fault, or the SkyTrucks built until 2019. We might guess that since the fault wasn't in the plans, they would not get it, but that might depend on whether they were built in the same factory as HA-LAJ, with the same practices.
It seems as if were both engines to fail, either one prop would be feathered and the lift spoiler on that side extended, or neither prop would be feathered. Presumably the pilot could feather the props himself. It is not apparent whether this would extend both lift spoilers too, or if those were controlled separately.
Right-wing radio is heavily subsidized by right-wing institutions funded by the billionaires we all know about. It is happy to repeat lies, without shame, at length until they are believed. No non-subsidized radio station can compete, so all AM talk radio is openly right-wing, and is all there is on the dial in most rural settings.
We know Australia was already occupied at least 40kya, and maybe 60kya, and they can only have got there by sailing out of sight of land, even when sea levels were at their lowest (~400ft below current level). Neanderthals were on all east Mediterranean islands except Cyprus ~200kya. (Cyprus is not visible from the mainland or other islands closer to land.) They had to have used boats, although they did not need to navigate.
We have reliable evidence of people in North America 37kya, at the Hartley mammoth butchery site, perhaps from the same rootstock as the Australians. Curiously, they lacked the fancy stone tool industry the Siberians brought in much, much later, which might trace all the way back to Europeans 20kya. Apparently there are plenty of other mammoth sites not excavated because they are dated "too old" to involve people. It took Tim Rowe, a decorated paleontologist whose land it was was found on, to get that one dug up properly. Still it seems like no one will talk about it.
The millennium of 12,000 years ago was also when Gobekli Tepe and related sites were constructed, right at the sudden end of the Younger Dryas cold spell. Maybe innovation was newly acceptable in response to the fast-changing climate.
They always call these "floating" gardens, but AFAICT they are always firmly attached to the bottom. What they are more like is flooded raised beds. The illustration in the article even seems to show them floating, but the description contradicts it. To make one, you drive in stakes and weave wickerwork in and out between them, and scoop mud from outside into the space. The channels get deeper, and the bed fills up with rich mud, which when high enough becomes dry enough to grow in. They drive in live willow stakes at the corners, which sprout and help hold it all together.
The article says both that the Aztecs developed the method, and that the pre-Aztec Nahuat were already using it.
Chinampas are still in operation in the poorer part of Mexico City, with some effort going into expanding them. They have had to erect filtering dams at the ends of the narrow channels between beds to keep pollution out of the water that feeds them.