Ultramarine: the science of our oceans and waterways

‘Remarkable’ freshwater turtles face quiet decline

This is an episode from our new podcast, It Starts With... available on Apple, Spotify and ConnectSci. If you enjoy this, check out part 2 of our turtles chat on It Star

4500m deep: remote observatory expands climate knowledge

David Boldeman speaks with CSIRO marine biogeochemist Dr Elizabeth Shadwick about one of Australia’s most important long-running ocean climate observation programs, the S

How do you give a whale a hearing test?

Host David Boldeman speaks with ConnectSci science journalist Imma Perfetto about new research that has, for the first time, measured the hearing range of humpback whales

How is ocean temperature measured?

David Boldeman is joined by science journalist Ellen Phiddian to explore a deceptively simple question: how do scientists actually know the oceans are warming? The conve

The first Arctic explorers: ancient communities thrived in harsh environments

Four and a half thousand years ago, people were already navigating the dangerous waters of the High Arctic. In this episode of the ConnectSci Podcast Ultramarine series

Earth's alien ocean

We travel nearly ten kilometres beneath the surface of our own planet to explore one of the most extraordinary discoveries in modern science. For decades, the search for

Did we accidentally design our cities for mosquitoes?

Mosquitoes are usually framed as pests and disease carriers. But what if they are simply one of the most successful species at adapting to the environments we have built?

The impact of shifting ocean currents

Ocean currents are the hidden systems that regulate Earth’s climate, moving heat and energy around the planet. But as the ocean warms, those currents are beginning to shi

The strange physics of tides

David Boldeman is joined by science journalist Ellen Phiddian to explore the strange and often misunderstood physics of tides. The conversation unpacks why most coastline

How do we measure sea level rise?

This episode explains how sea level rise is measured — not just that it’s happening. It demystifies the tools, the data, and the validation process that sit behind one of

How you can help save the Great Barrier Reef

In this Ultramarine episode of the Connect Sci Podcast, host David Boldeman speaks with Sean Daly from Citizens of the Reef about how students, teachers, and everyday Aus

The secret life of dams: small waters shape changing climate

Australia has more than 1.7 million farm dams, and together they play a far greater role in climate and environmental health than most people realise. In this episode of

Saving the Sydney Seahorse

Host David Boldeman explores the underwater world of the Sydney Seahorse (Hippocampus whitei) with marine expert Patrick Noble from Sea Life Sydney Aquarium. This small,

How to keep Sydney Harbour clean

Dive into the crucial issue of ocean pollution and explore real-world solutions with two passionate advocates for marine conservation. Ultramarine hosts David Boldeman an