A group of divers have discovered two underwater caverns in eastern Mexico that are believed to be the biggest flooded caves on the planet.

They believe the discovery could help reveal more about the ancient Mayan civilisation.

The group of leading archaeologists said the caves could reveal a lot about the rituals, the pilgrimage sites and ultimately the great pre-Hispanic settlements of the area.

Three Australian citizens have been arrested in a Belgrade hotel stormed by armed Serbian police.

Police report that half a billion dollars worth of cocaine was seized in the raid along with European, Australian, Chinese, Thai, and Vietnamese banknotes.

The arrested men are suspected to be linked to the discovery of a cocaine shipment seized in Sydney last April.

South Australia’s Tour Down Under cycling competition will be cut short due to today’s predicted record high temperatures.

The mercury is set to hit 41 degrees in the city and the mid 40s in some regional areas.

The public fun ride has also been completely cancelled as organisers say the health and wellbeing of all riders is their main concern.

The ‘Clean Energy Investment in Australia’ report has shown Australia’s renewable energy investment jumped by 150 per cent last year, with Australia now seventh on the world leaderboard.

Climate Council CEO Amanda McKenzie said it was no surprise that Australia is among the world leaders when it comes to the rollout of clean energy, with states and territory government’s leading the charge.

Concerns have been raised about the southbound Irukandji jellyfish as rising global temperatures push the species further south than ever before.

James Cook University Toxicology Professor Jamie Seymor said there is little doubt of the likelihood that the Irukandji will move further south towards the Gold Coast and Sunshine Coast.

Concerns were raised after an Irukandji jellyfish was caught on the western side of Fraser Island on Sunday, prompting warnings for swimmers to stay out of the water.

There have been calls for the safety procedures and safeguards around the South Bank boardwalk to be reviewed after pedestrians had to dodge an intoxicated driver late Tuesday afternoon.

Security Expert, Neil Fergus said the boardwalk is key to major events in Brisbane, and a safety review should be seriously considered in light of the recent events.

A Brisbane City Council spokesperson was unable to comment on whether or not a safety review will be undertaken at the Southbank precinct.

Russian human rights group Memorial has fallen victim to an arson attack in the country’s south overnight.  

CCTV of the incident shows two masked men climbing into the group’s building in the early hours of the morning, and then sparks flying from the windows shortly after.

Memorial says its part of an attempt to drive them out of the area, as they have angered Chechyna authorities over their reporting of disappearances, torture, and punitive house burnings.

Investors have rushed to sell off their Cryptocurrencies amid fears of a major regulatory crackdown in South Korea.

The price of Bitcoin fell by more than 20 percent to $US11000 after the South Korean Finance Minister announced that a ban on trading Cryptocurrencies such as Bitcoin, Ethereum, and Ripple was a definite possibility.

The price of Bitcoin peaked in December at $US20000 and has suffered a series of sell-offs and losses since.