Aliens, black holes and spoon bending: Freaky incidents scientists STILL can’t explain

It recently emerged that cosmic rays beaming towards Earth have left scientists baffled as they still cannot pinpoint their origin after seven years of study.

And there have been hundreds of as-yet-unexplained UFO sightings across the world over the years.

Conspiracy theorists have named a number of bizarre – and downright terrifying – incidents, sightings and unknowns that still have no scientific explanation.

Where ARE all the aliens?

According to the Fermi paradox – named after physicist Enrico Fermi – there are billions of stars in the galaxy that are similar to the Sun, many of which are billions of years older than Earth.

That mean there is a high probability some of these stars will have Earth-like planets – and will have developed intelligent life.

Which means there could be aliens out there – but they just haven’t visited Earth yet.

What science can’t explain is why – if aliens are out there – haven’t they visited Earth already?

Despite examining radio signals from other worlds for decades, scientists still haven’t detected any alien life.

Did we discover life on Mars already?

In 1976, the NASA Mars Viking lander was said to have “found life”.

The robot on Mars carried out three experiments to test for life. One came up positive but the other two experiments did not, so the positive result had to be dismissed.

But in 2012 a team of scientists re-examined the data using a new technique – and found evidence of biological life on the Red Planet.

Biologist Joseph Miller said: “The ultimate proof is to take a video of a Martian bacteria and watch the bacteria move.

“On the basis of what we've done so far, I'd say I'm 99 percent sure there's life there.”

How does the Placebo effect work?

The placebo effect is the unbelievable phenomenon of people overcoming illness by taking a “fake” sugar pill and believing it is really medicine.

Bizarrely, it appears to still work even when patients know they are taking a sugar pill – the simple act of taking one means they often “cure” themselves of their illness.

And it’s not just tablets, the placebo effect also works if you think you’ve had surgery – but actually haven’t had any at all.

Scientists still don’t have a solid answer for why believing you are taking medicine, when you aren’t actually, cures physical illness.

Black hole formation begins when a massive star dies and its core ends up collapsing in on itself.

A black hole is genuinely "black" and so it can only be detected by the effects its gravitational force has on other nearby objects.

Scientists do not know what happens if something – or someone – is sucked into a black hole.

Some theorists have suggested that anything falling into a black hole will be thrown into another universe or dimension.

Physicists used to think you wouldn’t notice you were falling into a black hole – others suggested you’d hit a wall of fire and be burnt to a crisp.

It seems there is no concrete answer – so probably best to avoid going near any.