Hidden Earth 2025: Confirmed Lectures, Films and Workshops

[HiddenEarth]

Hidden Earth 2025:
The Cleasby Hill Cave System​

45 minute lecture by Chris Curry

The Cleasby Hill Cave System, atop Arkengarthdale, will be discussed extensively at our upcoming September conference. You'll get a fascinating history lesson since its mining history of 1908, with a focus on the current exploration. A recent flood event opened a previously blocked path, leading to a significant digging, survey and exploration project undertaken by cavers from various clubs and backgrounds. This is one session you don't want to miss!

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Hidden Earth 2025 | The Cleasby Hill Cave System

A major cave system at the top of Arkengarthdale, with dozens of sinks across the hillside all flowing to the Roughton Keld resurgence. It was briefly entered by miners in 1908 and then lost for over a century. Since the 1950s cavers have been digging and pushing dozens of different leads trying...

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[HiddenEarth]

Hidden Earth 2025:
Greenland Caves Project 2023: Exploration of WUL-8, Wulff Land, North Greenland​

30 minute lecture by Gina Moseley

A much-anticipated exploration of the Greenland Caves Project 2023 finally came to fruition as an experienced team descended into 'WUL-8', a cave in North Greenland discovered during the Cold War. After landing by helicopter and abseiling down a cliff face, the team documented their exploration amidst challenging weather conditions. Despite being bound to base camp on several occasions, they explored and documented additional caves in the region, contributing significantly to our knowledge of one of the earth's northernmost karst areas.

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Hidden Earth 2025 | Greenland Caves Project 2023: Exploration of WUL-8, Wulff Land, North Greenland

The 2023 expedition of the Greenland Caves Project focused on the remote Wulff Land region of North Greenland, with the primary objective of exploring and documenting a large cave known as “WUL-8”. This cave, discovered (but not explored) during Cold War aerial reconnaissance, lies at 82 °N...

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[HiddenEarth]

Hidden Earth 2025:
Getting children and young people caving!​

60 minute lecture by Kai Trusson

Mark your calendars and join us in the upcoming caving conference. The 2-part talk focusing on getting the younger generation into caving covers quite a broad range of interesting points, from policy considerations and practical trip ideas to clothing suggestions. There's also an open session for questions and discussions so don't miss this opportunity to share your expertise.

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Hidden Earth 2025 | Getting children and young people caving!

This talk will be split into 2 parts each 30 minutes. Part 1 will cover: Policies and safeguarding (including what to do when an under 18 doesn't have a caving parent/Guardian) How to make it work with huts that just aren't set up for families with practical examples and advice e.g. the TSG...

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[HiddenEarth]

Hidden Earth 2025:
CUCC Loser Plateau Expedition​

45 minute lecture by Harry Kettle

In our recent CUCC expedition, we spent five weeks exploring the cave network under the Loser Plateau. One of our primary goals was to push deeper into Balkonhöhle, a challenge that necessitated underground camping. We also revisited Kaninchenhöhle, last explored a decade ago, where we focused on distant pushing fronts. New cave entrances were discovered with great potential for further exploration.

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Hidden Earth 2025 | CUCC Loser Plateau Expedition

Exploration of the cave network underlying the Loser Plateau in the Totes-Gebirges mountains has been ongoing by CUCC (and friends) since 1976, and continued with a 5-week expedition this summer. The Schwarzmooskogel (SMK) system extends to over 150km long and 1,100m deep. We are keen to...

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[HiddenEarth]

Hidden Earth 2025:
Adventures with Gay Outdoor Club Caving Group​

30 minute lecture by Philip Judson

At Hidden Earth, we'll explore how the Gay Outdoor Club Caving Group evolved from a casual group into some serious cave explorers, tackling caves like Otter Hole and Ghar Parau, and even launching expeditions in Russia and New Zealand. However, despite the club’s growth, the caving group has been inactive for a while. Could this be due to the LGBTQ+ community feeling accepted in other caving clubs?

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Hidden Earth 2025 | Adventures with Gay Outdoor Club Caving Group

The Gay Outdoor Club was founded in 1974 so that gay and lesbian people (that being before the coining even of the broader term,

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[HiddenEarth]

Hidden Earth 2025:
British Cave Science​

45 minute lecture by Andy Farrant & John Gunn

Fellow cavers, an exciting exploration into cave and karst science is happening this September. Insights into major caving expeditions, introduction to the British Cave Research Association, and details on grant funding will be shared. It's an ideal place to get a deeper understanding of cave science and to brush shoulders with like-minded explorers.

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Hidden Earth 2025 | British Cave Science

Caves are amazing time capsules of geological and human history, preserving records of past climate, landscape changes, ancient human activity, and biological evolution. This talk will showcase some of the great cave science that has been undertaken by British cavers in the past few years both...

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[HiddenEarth]

Hidden Earth 2025:
Scientific Investigations in Greenland’s Caves: Unlocking High Arctic Climate Histories​

30 minute lecture by Gina Moseley

Learn more about the findings of the Greenland Caves Project that has been exploring the High Arctic caves in Greenland since 2015. The limestone cave systems including sites in Kronprins Christian Land and Wulff Land offer clear records of climate variations dating back to 5 to 15 million years ago. The investigations have focused on U-Pb dating, stable isotope geochemistry, trace element analysis, and petrography, giving us unique insights into paleohydrology, permafrost dynamics, and past atmospheric circulation. These caves serve as critical climate archives, giving us a unique perspective on high-latitude climate variability.

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Hidden Earth 2025 | Scientific Investigations in Greenland’s Caves: Unlocking High Arctic Climate Histories

Greenland’s High Arctic caves represent a unique and largely untapped archive of past environmental change. Since 2015, the Greenland Caves Project has carried out multidisciplinary scientific investigations across several limestone cave systems between 80 to 82 °N in North Greenland, including...

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[HiddenEarth]

Hidden Earth 2025: An auSUSSpicious return to Crete: Gourgouthakas-Liontari 2025​

30 minute lecture by Michael Holliday

In August, Sheffield University Speleological Society members made a notable return to Crete for the Gourgouthakas-Liontari 2025 expedition within the Lefka Ori mountains. They boldly ventured through a 402m deep cave, transported dive bottles to an elevation of 1100m, and even survived a drone crash. A forthcoming talk will detail SUSS's involvement in this Greek expedition.

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Hidden Earth 2025 | An auSUSSpicious return to Crete: Gourgouthakas-Liontari 2025

This August, a new generation of Sheffield University Speleological Society returned to Crete for the Gourgouthakas-Liontari 2025 expedition in the Lefka Ori mountains. Trying their best to live up to a formidable local reputation, and attempting desperately not to get sunburnt: the group...

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Only a couple of weeks to go!
Get your discounted advanced tickets online. Spaces are limited on some things like the conference dinner so get your tickets now! https://hidden.earth/tickets

 

[mrodoc]

Volunteers required for cavers' Just a Minute this year. Four articulate (gobby?) people required plus (as I approach senility) somebody to keep score and blow the one minute whistle.

 

[HiddenEarth]

Hidden Earth 2025:
The Loss of a Crown (Kiln Piece Hole to Slaughter Stream Cave Connection)​

30 minute lecture by Tim Nichols

In the upcoming conference, Slaughter Stream Cave, known for its longest single entrance, will be a major topic of discussion. Confirmed in 2024 to connect with the Kiln Piece Hole, this connection raised many questions that remain unanswered. A newer generation, dedicated to the Greater Slaughter Project, has taken over to provide answers. Don't miss out on this discussion!

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Hidden Earth 2025 | The Loss of a Crown (Kiln Piece Hole to Slaughter Stream Cave Connection)

Slaughter Stream Cave at over 14km in length has long held the crown as the longest cave in the UK with a single entrance - Wet Sink - often leading to confusion as to the naming. Long suspected, but only confirmed in 2024 through dye-tracing, was a small choked swallet discovered in the 1970's...

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Only a couple of weeks to go!
Get your discounted advanced tickets online. Spaces are limited on some things like the conference dinner so get your tickets now! https://hidden.earth/tickets

 

[HiddenEarth]

Hidden Earth 2025:
A new cave survey device - The DiscoX1​

30 minute lecture by Brendan Hall

Keen for a revelation? Christian K's new cave survey device, the DiscoX1, that they've been chipping away at for years, is nearing completion. They leveraged Phil Underwood's open source SAP6 code to make this possible. Dive into its unique features at the caving conference.

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Hidden Earth 2025 | A new cave survey device - The DiscoX1

In 2023 Christian K and I gave a talk about how we planned to make a new cave survey device. Two years later, at the small cost of my sanity, we finally have a working prototype! In this talk, I'll show off its features, unique selling points and give you an insight into the painful journey it...

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Only a couple of weeks to go!
Get your discounted advanced tickets online. Spaces are limited on some things like the conference dinner so get your tickets now! https://hidden.earth/tickets

 

[HiddenEarth]

Hidden Earth 2025: London Underground:
The WCMS South East Round Up​

45 minute lecture by Sophie Hodson

Get ready to delve into South East's underground history beyond its tube network at WCMS South East Round Up! There, you'll get a chance to learn about the rich mining history that helped build England's iconic structures. Highlights include the latest activities of the Wealden Cave and Mine Society, including insight into various mines and the newsworthy Godstone 'sinkhole'. This one’s a must-attend for experienced cavers like us!

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Hidden Earth 2025 | London Underground: The WCMS South East Round Up

What’s underground in the South East, other than the tube network? Prepare to be amazed! There is a rich history of mining materials to build up some of the England’s most iconic buildings. Come to this South East Round Up to explore the Wealden District and the current activities of the Wealden...

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Last weekend for advanced ticket sales!
Get your discounted advanced tickets online. Spaces are limited on some things like the conference dinner so get your tickets now! https://hidden.earth/tickets