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The Circus as metaphor for: Planet Earth as Transient
Life Assembly Plant by the Druid Finn Abstract We
propose to formalize and test a cosmic supply-chain model in which
Earth functions as a transient planetary self-assembly plant — a Big
Tent erected for a finite run in the vast fairgrounds of space-time. In
this model, the “tent” is the planetary environment, the “performances” are
cycles of chemical and biological complexity, and the “audience” is the
transient biosphere that emerges, flourishes, and disperses before the tent
comes down. Using cosmochemical evidence,
especially from the OSIRIS-REx sample return from asteroid (101955) Bennu, we
link Earth’s role to the distribution of prebiotic materials produced in
stellar nucleosynthesis and supernovae, and
delivered to young planets. Life on Earth is thus understood not as an
eternal fixture but as the fleeting buzz of a travelling show — in human
terms, an 8-billion-year engagement, but in cosmic terms, barely a
moment. Bennu’s regolith confirms delivery of water-related salts
(including sodium- and magnesium-bearing phosphates) and abundant, soluble,
nitrogen-rich organics (ammonia, amino acids; racemic mixtures), exactly the
feedstock needed for a planetary “assembly floor.” We integrate this with
models of planetary chemical reactors and export mechanisms, generating
falsifiable predictions about isotopic anomalies, mineralogical concordance,
and chirality evolution. 1) Background and Rationale — The Cosmic Big Tent The
Circus Arrives. In this analogy, the “circus” is the temporary
alignment of cosmochemical, geological, and
astrophysical conditions that make Earth an active assembly plant for life.
Like a travelling show, the Earth’s “run” is scheduled: the tent was pitched
~4.6 billion years ago, the main act (complex biosphere) began roughly 3.8
billion years ago, and the closing act will occur when the Sun’s evolution
ends habitability (~8 billion years from the start). To eternity, that’s less
than a coffee break. Cosmic
Inventory. Hydrogen/helium formed in the Big Bang; heavier
elements were forged in stars and supernovae, then scattered as “cosmic dust”
— in truth, a cloud of atoms, ions, and small molecules. In the early solar
system, these condensed into planetesimals and volatile-rich asteroids such
as Bennu, carrying prebiotic stock for the Big Tent’s acts. Why Bennu
is the Backstage Delivery Truck. Bennu samples reveal: ·
Water-related evaporites
(sodium-rich carbonates, sulfates, chlorides,
fluorides) and sodium-bearing phosphates — ideal water-soluble
carriers of phosphorus, an essential ingredient for life’s high-energy
molecules. ·
Nitrogen-rich organics
including ammonia with ¹⁵N enrichments — indicating cold,
outer-solar-system or interstellar origins. ·
Amino acids in racemic form, consistent
with abiotic synthesis prior to the “show” of biology. These
components, like a circus’s costumes, rigging, and performers, are assembled
only temporarily for a unique, unrepeatable event. 2) Central Hypothesis — A Show with an Opening and a
Closing Night Earth is
a transient planetary self-assembly plant — the Big Tent — that: 1. Imports
prebiotic materials from exogenous sources like Bennu. 2. Stages
chemistry-driven performances, using sunlight, geothermal gradients, and
wet-dry cycles as lighting, sound, and choreography to produce molecular
complexity. 3. Disassembles the
show, returning the cast (atoms and molecules) to the cosmic road when the
tent comes down. 3) Specific Aims (All aims
from the original proposal are retained, but here they are seen as stages in
the performance.) ·
Aim 1 — The Props and Costumes:
Constrain the exogenous feedstock using Bennu’s measured inventory. ·
Aim 2 — The Rehearsals:
Demonstrate phosphorylation and polymerization under Bennu-like chemistries. ·
Aim 3 — The Performance Dynamics: Model
Earth’s planetary chemistry as a theatre of reaction networks, with opening
acts (prebiotic chemistry), main performances (evolutionary complexity), and
finales (export and dispersal). 4) Approach — Setting up the Tent 4.1
Feedstock Quantification: Using Bennu’s mineralogy and organic chemistry
as the supply manifest, model the delivery rates and chemical forms available
during the Hadean and early Archean. 4.2
Reaction Stagecraft: Conduct laboratory simulations mimicking Bennu’s
phosphate–ammonia–carbonate chemistry in environments akin to early Earth
brines, hydrothermal systems, and tidal flats. 4.3
Systems Model: Build a whole-show model that tracks element inflow,
chemical transformations, and product outflow — the entire run of the Big
Tent from pitching to dismantling. 5) Predictions — What the Critics Should See 1. Phosphate
Availability: Bennu-like water-soluble phosphates should enable
rapid nucleotide assembly under plausible early Earth conditions. 2. Isotopic
Fingerprints: Nitrogen isotope anomalies from exogenous ammonia
should be present in the earliest sediments. 3. Chirality
Development: Life’s eventual chiral bias must emerge from racemic
starting material, consistent with the circus arriving without pre-aligned
performers. 4. Mineral
Stage Props: Optimal prebiotic reactions should align with mineral
assemblages documented in Bennu’s evaporites. 6) Significance — Why This Show Matters This
framing makes clear that life on Earth is not a permanent fixture, but a scheduled
event in cosmic time. The Bennu results give us some of the prop list
for this production, and the performance itself — the rise and fall of
complex biospheres — is a finite run. When the lights go out, the
elements return to the road, ready to join another show under another Big
Tent. Manifesto of the Cosmic Fabrication Hypothesis |