Dr Olive Heffernan

I recently had the most wonderful chat about the ocean with Colm O’Regan (comedian, maths nerd, author of Climate Worrier) for The Function Room, a maths podcast. Such fun. We got into some serious number crunching, all while talking about the #highseas.

You can listen here:
lnkd.in/eFtzW3hc

Hard-Fought Treaty to Protect Ocean Life Clears a Final Hurdle

Morocco becomes 60th nation to ratify the High Seas Treaty, getting it over the line:

www.nytimes.com/2025/09/19/c...

To find out more about the wonders of the High Seas, and why this half of the planet deserves our attention, and protection, read my book, The High Seas, out now in paperback!

#highseas2024 #thehighseas #bbnj

Amazing news! The United Nations High Seas Treaty has crossed the required 60-country ratification threshold, meaning that the agreement will enter into force in January.

This is a major win for ocean conservation.

Congrats to all of those involved in making this happen!

#bbnj #highseas2024

I recently had the most wonderful chat about the ocean with Colm O’Regan (comedian, maths nerd, author of Climate Worrier) for The Function Room, a maths podcast. Such fun. We got into some serious number crunching, all while talking about the high seas.

You can listen here:
lnkd.in/eFtzW3hc

Congrats Sophie! Shame I didn't make it to the awards last night!

Thank you @profilebooks.bsky.social! and to all of the readers who have reached out. It's been an amazing journey so far. I look forward to many more conversations about the future of our ocean and planet.

The blue and green book The High Seas in the centre on a watery background, with the writing "out in paperback in July 2025" on the bottom-right side of the image, and the white Profile logo on the bottom-left of the image.

Happy Paperback Publication Day to The Irish Times Bestseller #TheHighSeas by @oliveheffernan.bsky.social! 🌊🌍

Get your copy here: tinyurl.com/TheHighSeasPB

Thank you! 😁

It's publication day for THE HIGH SEAS paperback! Thanks to my publishers and to everyone who has reached out about the book this past year. It's been an amazing journey so far. Looking forward to many more conversations about the future of our ocean.

#highseas #highseas2024 #ocean #environment

Great to see THE HIGH SEAS on display at Books at One, Letterfrack. Out in paperback from tomorrow!

#highseas #ocean #environment #highseas2024

This week I visited Pacific Palisades in LA, a neighborhood destroyed by the January fires. Shocking to see the scale of destruction, just outside of the city, and people's determination to start over and rebuild.

Only two days until the release of THE HIGH SEAS paperback!
Out July 3rd and available from all the usual places!

#highseas2024 #ocean #highseas #scicomm #environment

Thrilled to be a finalist for this year's Steve Connor Award for Investigative Journalism, for my piece in The Journal Investigates on the decline of Lough Hyne Marine Reserve. www.thejournal.ie/investigates...

Thanks to my editor, Maria Delaney, to my funders at The Pulitzer Center and to ABSW.

3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever She has a voice · Episode

Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection and my experience of being a woman reporting on the ocean.

A timely conversation for the end of the UN Ocean Conference in Nice.

You can tune in here: tinyurl.com/b9fhpj5y

3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever She has a voice · Episode

Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection, and my experience of being a woman reporting on the ocean.

A great conversation and a timely one for the UN Ocean Conference in Nice.

You can tune in here: tinyurl.com/b9fhpj5y

3x31 (EN) Olive Heffernan : Secrets of the High Seas and why they matter more than ever She has a voice · Episode

Delighted to speak with Eli Tremps for ‘She has a Voice’ about the mysteries of the high seas, ocean protection and my experience of being a woman reporting on the ocean.

A great conservation and a timely one for the UN ocean conference in Nice.

You can tune in here: tinyurl.com/b9fhpj5y

At an enlightening “Abyss talk” on deep sea mining in a tiny pub in Nice. Leticia Carvahlo here too! Loving UNOC. #unoc3 #ocean #deepseamining #highseas

Parks and Recreation: How Do National Parks Fit Into the National Picture? IRELAND'S EDGE · Episode

Ireland's Edge has released a podcast of a session I joined in Dingle 2024, on what ocean protection means in practice.

Raises many of the same issues discussed in my book THE HIGH SEAS, in David Attenborough's Ocean film, and at UNOC this week in Nice. You can tune in here: tinyurl.com/mr2hebyk

At UN Ocean Conference in Nice today. 50 states (inc EU) have now ratified the High Seas Treaty. 136 nations have signed. 60 ratifications needed soon to reach target of protecting 30 percent of ocean by 2030. Why is this important? All is answered in THE HIGH SEAS, out in paperback July 3rd.

If you've watched David Attenborough's most recent film 'Ocean' and want to learn more about the deep sea, mysterious ocean habitats and our past and future relationship with the ocean, read THE HIGH SEAS. Out in paperback July 3rd.

#DavidAttenborough #Books #NatureBooks #Ocean #Climate #UNOC

On World Oceans Day, dive into the story of our human relationship with the high seas - that half of our planet that is unclaimed territory. THE HIGH SEAS is out in paperback July 3.

profilebooks.com/work/the-hig...

On this World Oceans Day, consider the high seas and the need for UN member states to ratify the high seas treaty and ensure the protection of half of our planet!

Heading to UNOC in the morning. Maybe see you there!

#unoc #highseas2024 #oceans

Started today at Borris House listening to Melvin Sheldrake and Helen MacDonald discuss the entangled web of life on this planet. A pretty epic start to World Oceans Day!

YouTube video by New Scientist 99.999% of the ocean floor is still unexplored - what lurks beneath?

We explored the issue of mining the deep sea in the podcast, with @tinymaddie.bsky.social and @oliveheffernan.bsky.social www.youtube.com/watch?v=pbE0...

A new analysis by Oceana and GFW shows how China now dominates global fishing activity, accounting for 44% between 2022 and 2024. That's 57,000 vessels and 110 million hours of fishing time.
Full report here: lnkd.in/e3RWAuxW

#IUUfishing #highseas2024 #ocean #oceana @globalfishingwatch.org

A new analysis by non-profit Oceana, out today, shows how China now dominates global fishing activity, accounting for 44% between 2022 and 2024. That's 57,000 vessels and 110 million hours of fishing time.
Full report here: lnkd.in/e3RWAuxW

#IUUfishing #highseas2024 #ocean #oceana

THE HIGH SEAS, out in paperback July 2025. A timely read about the ocean and why it needs protection.

lnkd.in/eyBrFiqc

So honoured to be a finalist for the ABSW Steve Connor Award. Thank you @absw.bsky.social