Most of us already know that darkness is the absence of light, and that light travels at the fastest speed possible for a physical object. In this respect, darkness has the same speed as light.

The EPR paradox suggested particles traveled at speeds faster than that of light, which violated general relativity barriers. However, this was later demonstrated to be incorrect. Hence, the EPR paradox is wrong.

The end result is always the same, though: While it’s one of the weirdest and coolest phenomena in physics, there is no way to use quantum entanglement to send messages faster than the speed of light.” For now, we know that the interaction between entangled quantum particles is faster than the speed of light.

22.321 trillion MPH

Tachyons are hypothetical particles that travel faster than light. According to Einstein’s special theory of relativity – and according to experiment so far – in our ‘real’ world, particles can never travel faster than light. Taken together, all these virtual particles make up the quantum vacuum.)

“As objects travel faster and faster, they get heavier and heavier – the heavier they get, the harder it is to achieve acceleration, so you never get to the speed of light,” says Roger Rassool, a physicist at the University of Melbourne, Australia. “A photon actually has no mass,” he says.

Gerald Feinberg

Five different teams of physicists have now independently verified that elusive subatomic particles called neutrinos do not travel faster than light. The OPERA team made headlines after they suggested neutrinos traveled 0.002% faster than light, thus violating Einstein’s theory of special relativity.

Scientists said on Thursday they recorded particles travelling faster than light – a finding that could overturn one of Einstein’s fundamental laws of the universe.

Neutrinos could be key particles to unravel the nature of the dark matter of the Universe. On the one hand, sterile neutrinos in minimal extensions of the Standard Model are excellent dark matter candidates, producing potentially observable signals in the form of a line in the X-ray sky.

Because dark matter has not yet been observed directly, if it exists, it must barely interact with ordinary baryonic matter and radiation, except through gravity. Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.

Dark matter may not give off any light or radiation, but we might be able to watch it smash into atoms here on Earth. Dark matter makes up 85% of all matter in the Universe, but astronomers have never seen it. The nature of this mysterious — something — remains largely unknown.

In the game series Mass Effect, dark matter is manifested in the form of a substance called “Element Zero”, which is informally referred to as “eezo”. The dark energy that eezo produces is harnessed to power FTL travel, and prenatal exposure to eezo is capable of giving humans telekinetic abilities.

Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.

Unlike normal matter, dark matter does not interact with the electromagnetic force. This means it does not absorb, reflect or emit light, making it extremely hard to spot.

The key is that our universe is mostly made of regular matter, so antimatter cannot stick around for very long. Very soon after antimatter is created, it bumps into regular matter and gets destroyed again. Dark matter is matter that does not interact electromagnetically, and therefore cannot be seen using light.

The first variety is about 4.5 percent of the universe and is made of the familiar baryons (i.e., protons, neutrons, and atomic nuclei), which also make up the luminous stars and galaxies. Most of this baryonic dark matter is expected to exist in the form of gas in and between the galaxies.

XDF (2012) view: Each light speck is a galaxy, some of which are as old as 13.2 billion years – the observable universe is estimated to contain 200 billion to two trillion galaxies.