Cosmic Rose & Dark Matter

This cute but geeky Valentine’s poem is a good reason for us to introduce one of our new elementary particle reflectors with Particle Zoo design: DARK MATTER!
Scientists believe the universe is expanding due to Dark Energy, which makes up as much as 68% of the universe. Only 5% is matter that we know and the rest, 27% is dark matter. Dark matter cannot be seen, does not absorb or emit light. So how do we know it’s there? Astronomers have noticed that the behavior of large astronomical objects could not be explained with the gravitational forces between all known objects, so a mysterious dark matter with plenty of weight was added to explain the gravitational pull. Guesses to what dark matter is range from never seen elementary particles to heavier objects although as late as November 2013, it was ruled out that they were large primordial black holes. So maybe fun-sized primordial black holes?
In the early universe, dark matter was evenly distributed but the passage of time has left its mark and gravity has pulled it into clumps and empty spaces. Our Dark Matter funflector thinks life is good!