Novak Djokovic’s visa allowing him to compete in the Australian Open tennis tournament has been cancelled by the country’s immigration minister, Alec Hawke. “Today I exercised my power… to cancel the visa held by Mr Novak Djokovic on health and good order grounds, on the basis that it was in the public interest to do so,” the minister said in a statement.

The world No 1 now faces deportation and a three-year ban from Australia. While a further legal move from the star is likely, its chances of success are limited – as this article we published on Thursday explains, the minister’s powers in this area are difficult to challenge. This compelling story has been covered in depth by our editors and academic experts. Click here for all the background and updates as matters continue to unfold.

The latest episode of The Conversation Weekly, meanwhile, looks at how digital currencies are going mainstream. But countries are taking very different approaches to embracing this huge shift. If you’ve not checked out the podcast before, now’s a good week to start. We’ve also been taking a look at what will be one of the key global political events of the year, the French presidential election, and assessing Emmanuel Macron’s use of certain risqué words.

Stephen Khan

Executive Editor, The Conversation International

Banking on bitcoin: El Salvador announced plans to build a Bitcoin City in November 2021. Rodrigo Sura/EPA

Crypto countries: Nigeria and El Salvador’s opposing journeys into digital currencies – podcast

Gemma Ware, The Conversation; Daniel Merino, The Conversation

Plus, a philosopher explains the history of the idea that we might all be living in a simulation. Listen to The Conversation Weekly podcast.

Surgeon at the University of Maryland Medical Center in Baltimore, holding up the genetically modified heart that would be transplanted into David Bennett. University of Maryland School of Medicine

The journey to a pig-heart transplant began 60 years ago

Daniel M Davis, University of Manchester

How an Oxford scientist and a surgeon in Glasgow paved the way for organ transplants that wouldn't be rejected by recipients' bodies.

Bernice A. King, daughter of civil rights leader Martin Luther King Jr, at a recent press conference preview the King Holiday observance in Atlanta, Georgia. EPA-EFE/Erik S. Lesser

Africans and African-Americans would honour Martin Luther King by rekindling their bonds

Julius A. Amin, University of Dayton

King saw parallels between the anti-colonial movement in Africa and the civil rights struggle in the US.

‘The Gossip’ (ca. 1922) by American painter William Penhallow Henderson. Heritage Images/Getty Images

When meeting someone new, try skirting the small talk and digging a little deeper

Amit Kumar, University of Texas at Austin; Michael Kardas, Northwestern University; Nicholas Epley, University of Chicago

A series of experiments explored the seemingly radical idea that opening up to strangers can be deeply satisfying.

Southern Africa’s Namaqualand daisies are flowering earlier: why it’s a red flag

Jennifer Fitchett, University of the Witwatersrand

The progressively earlier flowering places the daisies at greater risk of failed flowering seasons. This would be a blow to biodiversity and tourism.

Piss off? Annoy? Shit on? Why Macron’s use of the French swear word ‘emmerder’ is so hard to translate

Pierre-Yves Modicom, Université Bordeaux Montaigne

You can only properly translate French scatological swear words if you consider who is using them. In this case, the most powerful person in France.