How have all the elements in the universe been created?

There are two classes of elements in the universe - those
that occur naturally and those that are man-made.

The first
class of elements comprises elements 1-92 on the Periodic Table and all of those are
already created.

The man-made elements consist of those
from element 93 to about element 120.  These elements are made by taking smaller atoms
and smashing them together at very high energy so that in some cases the smaller atoms
fuse to form larger elements.

As scientists learn how to do
this atom smashing with larger atoms and higher energies they expect to continue to
create new elements.  So it is likely that there are still more elements yet to be
created.   But understand that when creating these new elements in most cases only a few
hundred atoms may be formed of the new element and that most of the new elements almost
immediately breakdown again because they are not stable.