The only word we can think of is "Universe". But if that's the one the question is
fishing for, then its description is much too restrictive. The Universe is not only the
totality of all things that exist. It also includes all of the space in which they have
ever existed or could exist, as well as all of the time in which they have existed,
do exist, or will exist. Now that's a Universe.
If gravity did NOT exist, then we all would be floating in mid air and would float into things, like airplanes. Plus, then if we fall, we would be in outerspace. COOL!
Nebula exist in all galaxies.
No. People can not change into other things. There is no magic to change people and not mermaids/mermen. They do NOT exist in real life. You can not become one.
It does not exist at all whatsoever
orbit, the sun's gravity pulls all sorts of things into its orbit.orbital
The Universe.See also:Is there evidence for Creation?Can you show that God exists?
Biosphere
the biosphere
all
nothing at all
universe
All living things which we know of exist within the Earth's biosphere.
That's just like asking why humans exist, or why you and I exist. It's just the way things are, how things turned out from the past history and all.
metabolism
All things (objects) that exist are made out of matter.
because of all the animals they form it and they do things in it
The sum of all the fossils that exist is called that fossil record. It includes fossils from all geologic time periods.