Nick Kyrgios says he 'doesn't know what to believe' when asked if he think the Earth is flat

Nick Kyrgios has dived head first into the land of conspiracy theories during an interview on Logan Paul's podcast.

Hot off the back of a discussion about Jake Paul and Tommy Fury's upcoming boxing bout, the Australian tennis star was asked on his thoughts about the recent UFOs that were shot down in the US.

He admitted he had no clue what Paul and the other hosts were talking about, but that then sparked a big debate about conspiracies.

The 27-year-old said on the Impaulsive podcast that he's fascinated by different theories out there.

There are so many that it's hard to even know where to start.

From the old school rumours around how John F. Kennedy was killed and the moon landing, to the relatively new ones like chemtrails and what really happened on September 11, there's no shortage of topics to discuss.

But Logan asked Nick straight up about whether the tennis star thought the Earth was flat.

He replied with: "I don't even know what to believe anymore."

Nick said it with a small smile, so it's hard to work out whether he's actually questioning the shape of the Earth or if he was having a bit of banter.

The athlete was pressured to highlight his biggest conspiracy theory and that takes us on a little trip to Egypt.

The 27-year-old doesn't believe the pyramids were man made.

Logan certainly agreed, adding: "No way. How do they line up in perfect symmetry all around the Earth?”

Kyrgios said: “The doors are pretty big, and we as humans don’t need doors as big as those ones.”

Impaulsive co-host Mike Majlak suggested: “But other species..."

However, experts have been closing in on how Egyptians managed to create the pyramids without modern technology.

Physicists worked out that water was used to move the heavy pyramid stones and statues.

Daniel Bonn and other researchers from the University of Amsterdam decided to see if there was any logic behind the building technique shown in a wall painting in the tomb of Djehutihotep.

The painting from 1900BCE shows more than 170 men moving a statue with the aid of ropes attached to a sledge.

In front of the sledge, water is being poured over the sand, which sparked inspiration for the physicists to see how water affected the movement of objects in sand.

They did this on a miniature level and found the right amount of water would prevent the sand from becoming clumpy, which made moving stones more difficult.

Prior to this discovery, it was thought that the pouring of the water in the painting was a purely ceremonial act, rather than a key part of the construction process.

The findings seemingly put to bed endless speculation about how the pyramids were made.

According to the research, 'sliding friction on sand is greatly reduced by the addition of some - but not that much - water'.

This was so remarkably simple that even the physicists admitted that the discovery, which was published in Physical Review Letters, took them by surprise.