The Torres Strait Islanders' case against the Federal Government has been lost,  with the Australian Federal Court finding the Government does not owe a duty of care to them,  to mitigate climate change harms. It's the latest in a string of attempts to use the law to steer the Government on environmental issues. The next significant case will be the decision of the International Court of Justice about whether States are responsible for each other's climate harm. 

• Guest: Dr Chris McGrath, Brisbane-based barrister and Adjunct Associate Professor at University of Qld School of the Environment, environmental lawyer who has been involved in multiple climate change litigation cases over the past 20 years 
• Producers: Ann Arnold and Ali Benton

New archaeological discoveries continue to be made at the site of the San Jose shipwreck, 600 metres under the sea off the coast of Colombia. Described as the 'world's richest shipwreck', the Spanish galleon was sunk by the British in 1708, with hundreds of souls aboard and a heavy cargo of gold, silver and jewels from the Americas. But the ship's loot remains contested - with various nations, tribes and even a private salvage company staking a claim. 

• Guest: Ann Coats, Professor of Maritime Heritage, University of Portsmouth

As Australia marks 40 years since the introduction of HIV/AIDS testing, global health leaders are sounding the alarm over sweeping HIV funding cuts announced by Donald Trump, warning of devastating setbacks in the fight against the epidemic.

• GUEST: Bill Bowtell, Adjunct Professor at UNSW and Chief of staff to the Australian health minister, Dr Neal Blewett from 1983-1987.
• PRODUCER: Ali Benton  

A hundred years on from a landmark Supreme Court case about teaching evolution in American schools, the court paves the way for the Trump administration to dismantle the federal Department of Education.

• Guest: Bruce Shapiro, contributing editor with The Nation magazine; Executive Director of the Dart Centre for Journalism and Trauma at Columbia University 
• Producer: Catherine Zengerer 

Despite ambitious attempts, scientists have never been able to fully replicate the evolutionary wonder of the feather. However, avian inspired design has inspired new technologies such as anti-turbulence systems for aircraft, bio-inspired adhesives, and even quieter wind turbines.

• GUEST: Aerospace engineer and biologist Professor David Lentink, based at the University of Groningen in the Netherlands. 
• PRODUCER: Ali Benton

Given a lack of regional cooperation and some members of the IDF refusing to forcibly re-locate Palestinians, how would Trump and Netanyahu realise their plans for the so-called “Humanitarian city”? 

• GUEST: Irris Makler,  freelance journalist and analyst, specialising in the Middle East 
• PRODUCER: Catherine Zengerer

The Prime MinisterAnthony Albanese is leading a trade delegation ahead of a meeting with President Xi Jinping. The focus will be on de-carbonising steel, but Annabel Crabb says lobsters will also be on the menu, and they can reveal a lot about the state of global tariff negotiations. 

• GUEST: Annabel Crabb, ABC writer and presenter
• PRODUCER: Catherine Zengerer

This nation’s past can be understood a whole lot better if indigenous perspectives on history are listened to. It means considering rock art and other forms of storytelling, and the experiences that First Nations people have when they walk on country. Guests: Jackie Huggins and Ann McGrath, historians and co-editors of ‘Deep history: country and sovereignty’ (UNSW Press) Producer: Ann Arnold

Science in the United States is in crisis. The National Science Foundation, a key research funding agency, has suffered devastating funding cuts under the current administration. Critics say the cuts risk losing an entire generation of young scientists.

• GUEST: Naomi Oreskes, Henry Charles Lea Professor of the History of Science at Harvard University in the US. 
• PRODUCER: Ali Benton

There are plenty of theories about how the universe began. But what about the question of how it will all end? Humanity's final moments could be due to what's called vacuum decay, the big rip or heat death. Astrophysicist, Dr. Katie Mack, is obsessed with our cosmic future and says there's a certain freedom in knowing how it could all end.

• GUEST: Dr. Katie Mack, Hawking Chair in Cosmology and Science Communication at the Perimeter Institute for Theoretical Physics, Canada.
• PRODUCER: Ali Benton