You're right, it IS still exciting every time I get close. Here's a planet on the edge, being breathable for up to an hour only, on account of the CO2. What is nice is, it is a COOL planet, and not a COLD planet, and still with SO2 having a -6 exponent. Here you could enjoy 30°C warmer temperatures year round, over the average Cold planet and not die from SO2 or H2S. Also the O2 is in range for both partial pressure (around 2000m elevation on Earth) and inspired rate of O2 (around 60% max). Another planet you don't want to venture too close to sea level on.
BTW, when temps get over 130˚F (54˚C) it often leads to heatstroke. Humidity plays a large roll in how hot it feels too. For extreme cold temperatures, along with a high wind chill factor, hypothermia can quickly set in. A temperature of 0°F (-17.8°C) and a wind speed of 15 mph creates a wind chill temperature of -19°F (-28°C). Under these conditions frost bite can occur in just 30 minutes. Below -60°F (-51°C), according to the NWS, exposed skin can freeze in just 10 minutes. If you were swimming in cold water, around 40°F (4°C) you're expected to survive for only about an hour.
~ Some cold-related illnesses include: hypothermia, frostbite, trench foot (or “immersion foot”), chilblains, Raynaud’s phenomenon (when blood flow to your fingers, toes, ears, or nose is restricted or interrupted), & cold-induced hives.
~ When your body first drops below 98.6˚F (37˚C), you may experience shivering, an increased heart rate, a slight decrease in coordination, & an increased urge to urinate.
~ When your body temperature is between 91.4˚ and 85.2˚F (33˚ and 30˚C), you’ll decrease the amount of or stop shivering altogether, fall into a stupor, start feel drowsy, be unable to walk, experience quick alternations between rapid heart rate and breathing too slowly, & shallow breathing.
~ Between 85.2˚ and 71.6˚F (30˚C and 22˚C), you’ll experience minimal breathing rates, poor to no reflexes, inability to move or respond to stimuli, low blood pressure, & possibly go into a coma.
According to a 1958 NASA report (can't find link),
people can live indefinitely in environments that range between roughly 40˚F and 95˚F (4˚C and 35˚C), if the latter temperature occurs at no more than 50 percent relative humidity. See info graphic on first page of this thread. For ranges Frostbite occur, see this Windchill Chart
The famous explorer Magellan remarked on how the natives of Tierra del Fuego walked around naked in a climate where it rarely got above 50°F (10°C) in the summer. There is also a "-100 Club" of people who have visited the South Pole and have run, naked, out of the building, to the pole marker and around it a few times, and back, all while the air temperature is less than -100°F (-70°C). In the Antarctic, temperatures regularly get to -60°C, and people can survive here indefinitely if they have very good technical clothing that keeps their core body temperature within the normal range of 36.5-38°C.
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