Length10h 22m
About this audiobook
Every generation thinks resources are running out. Every generation is wrong. What changes is the technology that unlocks deeper, lower-grade, and more widely distributed deposits. Less than one percent of Earth’s subsurface has been systematically surveyed. The resource frontier is not shrinking. It is inverting.
The Deep Harvest follows four terrestrial frontiers nearing commercial viability within a single investment cycle: superhot rock geothermal, ocean-floor minerals, direct lithium extraction from geothermal brines, and natural hydrogen from basement rock. It also tests its own case, drawing lessons from $2.1 billion in vertical farming failures, nuclear overruns, ISA delays, and the thin evidence base for natural hydrogen.
Even with those risks, the leading terrestrial options offer faster payback, lower risk, and stronger energy economics than early-stage space resource projects. Book Two of The Edge of Progress, with The High Ground arguing the lunar case.
Audiobook details
GenreScience and Nature, Technology
Length10 hrs 22 mins
Narrated byListen with 1,000+ voices
FormateBook with Audio
Publish dateApr 11, 2026
LanguageEnglish
Table of contents
1Introduction
2Chapter 1: The Resource Horizon Fallacy
3Chapter 2: The Ocean Floor
4The Collection Proof
5The Acid Problem: From Ore to Metal
Show all chaptersShow less
6The Numbers Game: TMC vs. Iceberg
7Beyond Nodules: The Wider Mineral Portfolio
8Twenty-Four Years and Counting
9The Environmental Ledger
10Beyond the Cutting Edge: The Abyssal Autoclave
11The Gradient and the Gatekeeper
12Chapter 3: Into the Deep: Superhot Rock
13The Physics Behind the Multiplier
14What Killed the Well — And What Scaling Kills
15The Thermal Budget: Drawdown and Recharge
16The Commercial Path Already Open
17Beyond Volcanic Luck
18The Co-Extraction Loop
19Beyond the Cutting Edge: Kinematic Alchemy
20The Gradient Beneath
21Chapter 4: Natural Hydrogen: The One-Well Problem
22What the Earth Produces
23The Cost Gradient
24The Methanogen Tax
25The Pipeline Problem
26The Epistemic Gap
27Calibration Against the Evidence Hierarchy
28What Resolution Looks Like
29Chapter 5: The Dissolved Fortune
30The Sorbent Revolution
31The Biofouling Tax: What the Ocean Charges for Access
32Lithium from Any Brine
33The Brine Dividend
34The Underground Proof
35The Ceiling Holds
36Beyond the Cutting Edge: Algorithmic Biosorption Plumes
37The Demonstrated Science
38The Speculative Leap
39Current Limitations
40The Flow and the Gradient
41Chapter 6: Biology Eats Mining
42The Ore That Thinks
43Enzymes at Factory Scale
44Growing the Supply Chain
45Cities as Ore Bodies
46The Tailings Park
47The Serpent in the Circle
48The Biological Gradient
49Chapter 7: The Built Frontier
50The Frame Starts Storing Carbon
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