Logically if the fly's body is black for camouflage then so should its wings be. Is the extreme difference in colour between the body and the wing instead acting as a heat source and heat sink resp. with a thermal differential effect then aiding/driving muscles?

I was talking to my brother the other day and we got round to the question of the end of the universe. I wondered what temperature would the last surviving atom be at. I said it would be infinity hot as all the heat of the universe would have gone to it. My Brother said it would be very cold as all the heat would have dissipated into the void. Who is correct.

I believe this falls into the category of thermodynamics. I have been working with vacuum queries lately and began to wonder to myself whether, in two identical systems, a better vacuum would be achieved if the system was hot or cold or would it be the same?

If we consider thermodynamics and its law that heat travels from hot to cold, I was curious as to how or what occurs when sunlight is travelling to Earth. The gap between the Sun and the Earth is effectively a vacuum and also the low pressure at high altitudes mean that it is very cold, surely the heat should be dispersed by then and not reach sea level.

I would like to know how we still manage to feel the heat.

Thank you

I've been told that temperature can be explained by how fast molecules are moving around, the higher the temperature the faster they move and the more kinetic energy they have.  This is however confusing as different molecules will move around at different paces and will exist as different states at the same temperature i.e. at room temperature oxygen will be a gas whereas molecules in a chair will be solid.

 Therefore how do you define temperature?

If one drops a frozen turkey from a table, it hits the floor. If one instead drops it from space, it burns up in the atmosphere. Thus, there should be one altitude in between from which you can drop it for it to be done when it comes down.

I realize that it's probably going to go black on the outside and still stay frozen on the inside. How can you deal with this? I will accept leaving it for some time after the fall to allow the heat to distribute properly, I will also accept some or a lot of the outside to burn up if the centre is cooked, burned turkey can be removed but I've heard bad things about uncooked bird.

How does this change with the stuffing? Will it help a lot to thaw it?