The World Today

Extensive studies of Australia's southern coastlines have discovered one of the most diverse sites for fossilised footprints from hundreds of thousands of years ago. Researchers have uncovered the trace fossils of more than 300 mammals, birds and reptiles on Kangaroo Island off South Australia. The find has given scientists a clearer picture of just how widespread some of Australia's ancient or extinct creatures were, including the Tasmanian tiger.

A relatively new medical technology that dramatically improves lives of amputees is taking off in Australia, according to medics. Osseointegration - which involves attaching a prosthetic directly to the limb - is now more accessible thanks to revolutionary surgery techniques. And researchers say it could become even more effective with the aid of virtual-reality and 3-D printing technologies.

The police officer who shot dead Australian woman Justine Damond is isolated and has been all but abandoned by his department. The Minneapolis Police Chief has spoken for the first time since the shooting, saying the Australian 'didn't have to die'. Officer Mohamed Noor is still refusing to speak to investigators. People are rallying in Minneapolis against police violence.

The attorney who represented the family of OJ Simpson's murdered ex-wife says the former football star's successful parole application is proof that parole reform is needed. Celebrity lawyer Gloria Allred represented the family of Nicole Brown Simpson during the 1994 murder trial that became the most watched in history. OJ Simpson was found not guilty by the jury, but 13 years later was convicted for a 2007 armed robbery and kidnapping in Las Vegas.

International concern is growing about a humanitarian crisis in Yemen, as the country teeters on the edge of a famine, made worse by a cholera outbreak. Yemen, which is on the southern edge of the Arabian Peninsula, has been engulfed in civil war since September 2014, when Houthi Shiite rebels swept into the capital and overthrew the government. Last week the UN officials said Yemen's suspected cholera caseload has surged past 313,000 and caused over 1,700 deaths, making it the world's largest outbreak.

The ongoing civil war in Yemen has caused an outbreak of cholera that has so far claimed 1,800 lives. There are around 360,000 cases of the disease, which has resulted from failing water infrastructure and health services, compounded by a population on the brink of famine. Nigel Timmins, Oxfam's humanitarian director, estimates that around 7 million Yemeni people are suffering from severe hunger across the country, with around 17 million people requiring some form of assistance.

Analysts say the shutdown of the world's largest dark web marketplace isn't that much of a blow to the global online trade in illicit goods. A joint US-European police operation has resulted in the closure of two major sites on the so-called dark web. But the enormous global market for drugs, fake IDs, illegal firearms, and child pornography is continuing to expand. But cybersecurity experts are pointing out the dark web has its good side too.

Cryptocurrencies like Ethereum are vital in the operation of dark net markets. They're completely anonymous, meaning that the purchase of illegal goods can be untraceable. But the currency is also completely unregulated, decentralised and vulnerable to hackers. And that's recently cost users about $30 million.

Two people are dead after a powerful 6.7 magnitude earthquake struck overnight off the Greek island of Kos in the Aegean Sea. The quake triggered a miniature tsunami and sent terrified residents and holidaymakers running into the streets. Con Melis is a Greek Australian from Sydney who is there on holiday with his family.

Senior members of the Prime Minister's frontbench are publicly rebuking his predecessor, Tony Abbott, over what they say are unhelpful interjections. This week Mr Abbott cast doubt on Malcolm Turnbull's decision to set up a Home Affairs super ministry, saying he was told it wasn't necessary. This weekend the New South Wales branch of the Liberal Party will be asked to vote on an internal issue over which Mr Abbott and Mr Turnbull are at odds. Foreign Minister Julie Bishop says Mr Abbott's criticisms only help the Opposition Leader, Bill Shorten.