being in the sun/working on farm
People can stay in space as long as they have plenty of oxygen, food and water!
it is a greeting that has been created and been here a long time so basically it is just naturally
If you talk with French people and stay a long time, sure ! :)
Communities are expected to change naturally over long periods of time because the environment changes.
Simple: People cannot stay in space for a long time because although they have stored oxygen, it cannot last forever. Eventually they will lose all oxygen, and if they have not returned to earth before their oxygen runs out, they will die.
People will notice that they aren't aging.
A long time!!
No. While it occurs naturally in some foods and is added in others (milk, for example), you can also get it from supplements or from unprotected (no sunscreen or long sleeves) time in the sun (but do not stay out too long as you do not want to get sunburn).
Because people would notice they don't age.
Not cut it for a long time.
a few of the sea animals cannot stay under water for a long time.
well a beluga can stay for 12-15 months that is a long time