How long is one human generation?
From birth of parent to birth of child. 20 years is a nice round average-ish kind of number.
However, none of that is evidence that it is not designed.
The same reason there is for doing literally anything.
To woo women?
You ask what latitude has to do with solar heating of a car. At noon on the spring equinox, the sun is going to be beating straight down on the roof of a car. On the same day at the North pole, the sunlight is going to be travelling horizontally straight through the car. Even at the peak of summer, the sun is only 23.5 degrees above the horizon. The bulk of the sun's rays are going to travel straight through the car. Latitude is crucial to how much energy the car can absorb.
You say that the air temperature is irrelevant to the heat inside the car. This is clearly false. Cars are not perfect insulators. Heat flows out of them, and the rate at which the heat flows out is proportional to the temperature difference between the inside and the outside temperatures. So, in the cold of the arctic, the heat is going to flow out faster than it would in the Arizona desert.
You claim Siberia in the summer is one of the hottest places on Earth. You ask if the dash implies the outside of the vehicle. You claim that the windows of a car are always perpendicular to the sun.
I can come to only one conclusion...
I have been trolled.
the tank can carry six men each up to 6'6" (198cm) tall and weighing up to 16 stone (101kg, 224 pounds)
For such a modern tank the measurement units seem like they came from the stone age.
Exactly. Tanks containing men? I thought they were all ROVs and UGVs these days.
No, if they had technical skills they would be playing on a PC.
No, if they had technical skills they would be playing on a linux or BSD box, with an arduino project on the side. FTFY