Supermassive black holes, containing as much mass as millions or billions of suns, exist at the centre of all galaxies, including our own Milky Way.
NASA Goddard Space Flight Center
Tanya Hill speaks with Meg Urry about distant galaxies and the supermassive black holes that lurk in their centres.
Rail and other public transport infrastructure could receive more funding from the new Turnbull government.
Jamie Briggs talks to Michelle Grattan about his new portfolio, the policy pivot away from just roads toward other infrastructure projects like public transport, and much more.
Kim Carr says that $100,000 university degrees are ‘totally unnecessary’.
Shadow Higher Education Minister Kim Carr talks to Michelle Grattan about Labor's new higher education policy.
Liberal candidate Andrew Hastie has campaigned strongly on local issues.
Natalie Mast spoke with William Bowe about what the leadership spill means for the Canning byelection, which looms as a test of both new Prime Minister Malcolm Turnbull and Opposition Leader Bill Shorten.
Arthur Sinodinos was a key supporter of Malcolm Turnbull’s successful leadership challenge.
Arthur Sinodinos, a key backer of Malcolm Turnbull, talks about why the Liberals needed a change in leadership and what he hopes will change in the running of the Prime Minister's Office.
Who ya gonna call? The World Health Organization has been criticised for its poor response to last year’s Ebola outbreak.
William Isdale speaks with Lawrence Gostin about the lessons we can learn from the global response to last year's Ebola outbreak and the future of global health.
Despite the slowdown in China, Josh Frydenberg says that there are strong signs for the Australian economy.
Assistant Treasurer Josh Frydenberg talks to Michelle Grattan about Syria, Australia's humanitarian refugee intake, the economy, and much more.
Noami Klein speaking in Sydney.
Christopher Wright speaks with Canadian journalist, author and activist Naomi Klein about capitalism's impact on the environment and how it has influenced our responses to climate change.
The campaigning is building up for the byelection in Canning on September 19.
Rebecca Le May/AAP
Michelle Grattan speaks with Labor candidate Matt Keogh, deputy Labor leader Tanya Plibersek, Finance Minister Mathias Cormann, Greens leader Richard Di Natale and Greens candidate Vanessa Rauland.
Congested roads and overcrowded public transport services are common problems in many of our cities.
Australia's transport infrastructure needs urgent upgrades. But with governments willing to fund only one or two major projects, how do we decide which infrastructure project to prioritise?
This week Prime Minister Tony Abbott was beset with problems, including leaks and the sourness left by the entitlements scandal.
It's never helpful for a government to become the object of ridicule, so when the Coalition's speaking notes were leaked for a second day running it was embarrassing.
From one of the “hunters to being one of the hunted”: the Nationals’ Michael McCormack is a former journalist-turned-politician.
The Nationals member for Riverina, Michael McCormack, talks about politics and journalism, the future of the Nationals' leadership, tax reform and much more.
It will be many years before life returns to normal in the Langtang valley, one of the regions worst-affected by the earthquakes in Nepal.
Hayley Saul and Emma Waterton were in the Langtang valley in Nepal when the massive earthquake hit. Dallas Rogers spoke to Hayley and Emma about their subsequent rescue and the everyday Nepalese hero.
Clare O'Neil, with her colleague Tim Watts, has written a book that looks at Australia in 2040. She speaks with Michelle Grattan about the book, and the future of progressive politics in Australia.
Chris Bowen talks about his new book, The Money Men, in which he analyses twelve of Australia’s most notable treasurers.
Chris Bowen and Michelle Grattan step away from the day-to-day politics to talk about Bowen’s new book, The Money Men, in which he writes about twelve of Australia’s most notable treasurers.
ALP infrastructure spokesman Anthony Albanese discusses the national conference with Michelle Grattan.
Michelle Grattan speaks with infrastructure spokesman Anthony Albanese about the ALP national conference and then with immigration spokesman Richard Marles about boat turnbacks.
Ben Oquist, former chief of staff to Greens leaders Bob Brown and Christine Milne, says Tony Abbott risks being on the ‘wrong side of history’ at the 2015 Paris climate summit.
Ben Oquist on the direction of the Greens and the Senate crossbench.
Ben Oquist, Executive Director of the Australia Institute, talks to Michelle Grattan about the current direction of the Greens, the Senate crossbench, climate change, and much more.
The issue of climate change has the potential to unite many countries, says Christophe Lecourtier.
Lukas Coch /AAP
The French Ambassador to Australia Christophe Lecourtier sits down with Michelle Grattan to talk about the 2015 Paris climate conference, Australia’s role in tackling climate change and much more.
Tim Soutphommasane announced a new stage in the National Anti-Racism Strategy.
Race Discrimination Commissioner Tim Soutphommasane talks about Dawn Fraser's comments, "Team Australia", the government's approach to terrorism and asylum seekers, racism in Australia and more.
Prime Minister Narendra Modi has promised economic growth and good times ahead for India, but faces many challenges.
Speaking with Anthony D'Costa on the challenges facing India’s economy.
With about half of its population under the age of 25, how will India create enough jobs to cater for the millions of young people entering its workforce?