00:04NASA's New Horizons probe is now way out past Pluto, in the darkest reaches of our solar system.
00:10But there's just one thing. It isn't as dark as expected.
00:12The spacecraft has been picking up twice the amount of light on the optical spectrum as expected.
00:17But it's not coming from stars, but rather from between them.
00:20And it might actually have to do with one of the universe's greatest mysteries.
00:23Dark matter.
00:24Dark matter remains elusive because it cannot be detected directly.
00:27Rather, it's the name we've given to the cause of excess gravity when calculating cosmic masses.
00:32But if dark matter is real, scientists say it accounts for 80% of all matter in the universe.
00:37So how are we seeing light out in space produced by dark matter if we can't detect dark matter?
00:42Well, experts say it might have to do with hypothetical particles called axions.
00:46Axions might be the solution to why there's so much gravity in the universe.
00:49Or it could actually be the dark matter scientists are looking for.
00:52Which is why this discovery is so important.
00:54As scientists have now been able to put together a mathematical model.
00:57That reveals that axions with a mass between 8 and 20 electron volts.
01:01Could create all this extra light New Horizons detected.
01:04Meaning we may be one step closer to understanding axions.
01:07And by default, maybe even dark matter.
01:10about that is not fair.
01:11To find out50 ali's stem colours.
01:12Whichever can identify with humans expressed many more per se admit around this.
01:13Whichever has occurred in 20 minutes.
