As Man probes ever deeper into the mysteries of the Universe, his search seems to yield more questions than answers. Some of the most mysterious phenomena discovered in space are dark matter and dark energy.
Approximately 80 per cent of the mass in known Universe is made up of "dark matter," a strange and intangible substance that yet scientists have not been able to identify or observe directly. Dark matter is not visible to the naked eye, and does not emit light or energy.
So how do we know it even exists?