Dr Olive Heffernan
@oliveheffernan.bsky.social
Science journalist and author of THE HIGH SEAS. Lover of all things oceans.
Thanks to the Beta Festival 2025 for a great discussion on the politics of water, at Dublin's Digital Hub this weekend.
#highseas2024 #oceans #oceanconservation
#highseas2024 #oceans #oceanconservation
November 9, 2025 at 5:43 PM
Thanks to the Beta Festival 2025 for a great discussion on the politics of water, at Dublin's Digital Hub this weekend.
#highseas2024 #oceans #oceanconservation
#highseas2024 #oceans #oceanconservation
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
You can listen here:
lnkd.in/eFtzW3hc
September 20, 2025 at 3:10 PM
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
You can listen here:
lnkd.in/eFtzW3hc
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
#highseas2024 #thehighseas #bbnj
September 20, 2025 at 12:00 PM
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
#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
This is a major win for ocean conservation.
Congrats to all of those involved in making this happen!
#bbnj #highseas2024
September 20, 2025 at 11:59 AM
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
This is a major win for ocean conservation.
Congrats to all of those involved in making this happen!
#bbnj #highseas2024
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
#highseas #highseas2024 #ocean #environment
July 3, 2025 at 1:59 PM
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
#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
#highseas #ocean #environment #highseas2024
July 2, 2025 at 11:30 PM
Great to see THE HIGH SEAS on display at Books at One, Letterfrack. Out in paperback from tomorrow!
#highseas #ocean #environment #highseas2024
#highseas #ocean #environment #highseas2024
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
Out July 3rd and available from all the usual places!
#highseas2024 #ocean #highseas #scicomm #environment
July 1, 2025 at 3:58 PM
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
Out July 3rd and available from all the usual places!
#highseas2024 #ocean #highseas #scicomm #environment
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.
June 10, 2025 at 11:49 AM
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
#DavidAttenborough #Books #NatureBooks #Ocean #Climate #UNOC
June 10, 2025 at 11:44 AM
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
#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...
profilebooks.com/work/the-hig...
June 8, 2025 at 9:55 PM
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...
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
Heading to UNOC in the morning. Maybe see you there!
#unoc #highseas2024 #oceans
June 8, 2025 at 9:53 PM
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
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!
June 8, 2025 at 9:53 PM
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!
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
Full report here: lnkd.in/e3RWAuxW
#IUUfishing #highseas2024 #ocean #oceana @globalfishingwatch.org
June 5, 2025 at 1:35 PM
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
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
Full report here: lnkd.in/e3RWAuxW
#IUUfishing #highseas2024 #ocean #oceana
June 5, 2025 at 1:34 PM
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
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
lnkd.in/eyBrFiqc
June 2, 2025 at 5:53 PM
THE HIGH SEAS, out in paperback July 2025. A timely read about the ocean and why it needs protection.
lnkd.in/eyBrFiqc
lnkd.in/eyBrFiqc
THE HIGH SEAS is out in paperback from July 3rd, and available from all the usual outlets. A particularly timely read on the state of the open ocean and what we can do to protect this vast frontier.
@profilebooks.bsky.social #highseas2024 #thehighseas #oceanprotection #ocean
@profilebooks.bsky.social #highseas2024 #thehighseas #oceanprotection #ocean
June 2, 2025 at 5:41 PM
THE HIGH SEAS is out in paperback from July 3rd, and available from all the usual outlets. A particularly timely read on the state of the open ocean and what we can do to protect this vast frontier.
@profilebooks.bsky.social #highseas2024 #thehighseas #oceanprotection #ocean
@profilebooks.bsky.social #highseas2024 #thehighseas #oceanprotection #ocean
I had a brilliant time with the Women from the Sea team at EU Maritime Day in Cork last week. What a pleasure to meet such an inspiring team! Find out more about this UN Ocean Decade project, focused on women with a deep ocean connection, at: lnkd.in/eKYqShee
May 26, 2025 at 10:37 AM
I had a brilliant time with the Women from the Sea team at EU Maritime Day in Cork last week. What a pleasure to meet such an inspiring team! Find out more about this UN Ocean Decade project, focused on women with a deep ocean connection, at: lnkd.in/eKYqShee
THE HIGH SEAS paperback has arrived in London. I can't wait to get my copies next week! Available from July 3 in all the usual places.
#thehighseas #highseas2024
#thehighseas #highseas2024
May 14, 2025 at 5:32 PM
THE HIGH SEAS paperback has arrived in London. I can't wait to get my copies next week! Available from July 3 in all the usual places.
#thehighseas #highseas2024
#thehighseas #highseas2024
Such a thrill to join the conversation on New Scientist's "The World, The Universe and Us" podcast about Trump's executive order to fast-track deep-sea mining and what lives in those deep, dark waters.
lnkd.in/e5vCgirC
#ocean #deepseamining #trump @newscientist.com
lnkd.in/e5vCgirC
#ocean #deepseamining #trump @newscientist.com
May 10, 2025 at 2:59 PM
Such a thrill to join the conversation on New Scientist's "The World, The Universe and Us" podcast about Trump's executive order to fast-track deep-sea mining and what lives in those deep, dark waters.
lnkd.in/e5vCgirC
#ocean #deepseamining #trump @newscientist.com
lnkd.in/e5vCgirC
#ocean #deepseamining #trump @newscientist.com
Yesterday, I spoke to BBC News Northern Ireland about David Attenborough's new Ocean documentary and the challenges facing the high seas.
You can listen to the playback here: lnkd.in/esTT_FUN
You can listen to the playback here: lnkd.in/esTT_FUN
May 9, 2025 at 3:44 PM
Yesterday, I spoke to BBC News Northern Ireland about David Attenborough's new Ocean documentary and the challenges facing the high seas.
You can listen to the playback here: lnkd.in/esTT_FUN
You can listen to the playback here: lnkd.in/esTT_FUN
It's been almost a year since THE HIGH SEAS was released, and I'm excited to share a preview of the paperback cover, out on July 3rd!
This book is for anyone who wants to take a deep dive into the future of the #ocean, Earth's last true wilderness.
This book is for anyone who wants to take a deep dive into the future of the #ocean, Earth's last true wilderness.
May 7, 2025 at 8:59 AM
It's been almost a year since THE HIGH SEAS was released, and I'm excited to share a preview of the paperback cover, out on July 3rd!
This book is for anyone who wants to take a deep dive into the future of the #ocean, Earth's last true wilderness.
This book is for anyone who wants to take a deep dive into the future of the #ocean, Earth's last true wilderness.
And into the sea I go to lose my mind and find my soul.
That’s where I’ll be for the next couple of weeks! Reconnecting with the big blue and finding renewed inspiration. Can’t wait to rejoin the conversation on all things ocean-related upon my return. 🐟🌊🐬🐳
That’s where I’ll be for the next couple of weeks! Reconnecting with the big blue and finding renewed inspiration. Can’t wait to rejoin the conversation on all things ocean-related upon my return. 🐟🌊🐬🐳
April 12, 2025 at 12:35 PM
And into the sea I go to lose my mind and find my soul.
That’s where I’ll be for the next couple of weeks! Reconnecting with the big blue and finding renewed inspiration. Can’t wait to rejoin the conversation on all things ocean-related upon my return. 🐟🌊🐬🐳
That’s where I’ll be for the next couple of weeks! Reconnecting with the big blue and finding renewed inspiration. Can’t wait to rejoin the conversation on all things ocean-related upon my return. 🐟🌊🐬🐳
Yachting Monthly has reviewed THE HIGH SEAS for its book club, and calls it "an important, disquieting book".
Thank you!
#thehighseas #highseas2024
Thank you!
#thehighseas #highseas2024
April 2, 2025 at 11:15 AM
Yachting Monthly has reviewed THE HIGH SEAS for its book club, and calls it "an important, disquieting book".
Thank you!
#thehighseas #highseas2024
Thank you!
#thehighseas #highseas2024