Researching better and more ways to keep cool in very warm conditions

Finding better ways and more ways to keep cool in very warm conditions.

Just some ideas for research:
Ideal amount of hair. Enough to protect from the sun, but less enough hair so that heat leaving your head won't get trapped too much. Or just bald.

Research differences in hair colour and heat absorption from the sun.

Research skin colours and head absorption from the sun.

Maybe different kinds of breathing.

Maybe keeping the body very relaxed.

What surface is best to lay down on to get rid of excess body heat.


Extra: What to do and what not to do.