Cell membranes are one of the key elements of a cell, they are responsible for separating the interior of the cell from the outside. Cell membranes have a phospholipid bilayer which is a double layer of phospholipid molecules that forms the structure of cell membranes. They have a simple structure which means that they won't survive in every environment right? In 2023 a new study came out, that there might be cell membranes in space. As we know earth started around 4.5 billion years ago this was just a few hundred million years ago after the solar system started which involved many molecules in the process many wonder how the molecules came together and formed so quickly. There is an idea that space is filled with a bunch of things molecules, and cloud dust which are particles in an oxidizing gas (which are compressed gases like air) at very low particle concentrations. It turns out astronomers found amino acids and molecules that can store DNA, meaning that if amino acids can survive, many other things like cell membranes can survive.