In another question I asked if you could preserve food in space.

I want to know is there a way to preserve a piece of food indefinitely or for a very very long time.

Let’s say an apple, a sandwich, and a steak.

Here are some variables I’m going to cut out.

Let’s say each is prepared normally. No preservatives besides what you would normally do like salt and spices. It has to be edible.

Let’s assume that the food itself is sterile and the environment it will be in is too.

Each food will also in its ideal temperature and humidity.

It will be in a place devoid of air and light.

With those conditions, how long do you think each food would last?

What would cause it to go bad in those conditons?

Without using chemicals, what else could be done to improve the conditions?