If you have a snowmobile you don’t need a paved road. OTOH, pretty soon at the North pole you’ll be needing a boat, not a snowmobile.
“Sharks can occasionally travel short distances through air when pursuing prey, but their attenuation coefficient is pretty high.”
I take it that blue means effective, yellow means ineffective and green partially effective.
Blue? I only see gray and yellow.
Gray, yellow, and grayish-yellow.
I see gray (effective), yellow (not effective), and a light greenish-gray for the partially effective.
And this chart brings me back to my nuclear power school days where we studied shielding and tenth-thicknesses for gammas, neutrons, alpha particles, beta particles, etc. But not sharks. 
I see the same as you, but this might be something like the infamous dress.
I see a pale Goldenrod, Mishka and Kidnapper, personally. But it depends on your monitor.
While oven mitts may not provide much protection against sharks, “boop”ing can be surprisingly effective:
https://amp.charlotteobserver.com/news/local/article231162853.html
Florida Museum’s International Shark Attack File says it’s the tip of the nose that makes the best target, but warns that one’s aim must be good, considering “the mouth is close to the nose.”
Sage advice.
Perhaps we can say it’s handy advice?
It does give, “Draw back a bloody stump,” a vivid mental image.
The very first square is wrong, or at least misleading. Air is inconveniently effective at shielding gamma rays, at least at full atmospheric thickness. Gamma ray astronomy must be done entirely by satellites.
It wasn’t claiming that much thickness in the slightest. Nothing misleading about it.
“The inflection point was probably in late 1966 or 1967, so when Neil Armstrong flew to space on Gemini 8, plate tectonics was not widely accepted, but when he landed on the Moon three years later it was the mainstream consensus.”
“It comes with a certificate of authenticity, which comes with a certificate of authenticity, which comes with a…”
But if you’ve earned it, is it still a forgery?
“Carefully maneuvering the balloon down a mineshaft in an effort to break the OTHER altitude record”
I’m no expert, but I don’t think 2 mph is anywhere near the record. Maybe if they launched during a hurricane…
Wouldn’t that be groundspeed, as the airspeed of an unpowered lighter than air craft tends to zero? Or is that the point?
The alt-text brings to mind Bob and Ray’s “World Champion Low Jumper” routine.