Big Think

Our universe keeps expanding. But why? | Lee Cronin


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**🌌 What If the Universe Expands Because of… Selection?**

Sounds wild? It is. But maybe it’s not nonsense.

Let’s dive into this provocative idea — that **life, selection, and novelty** might be *fueling* the Universe’s expansion.

### šŸŒ€ The Setup: A Universe in Motion

The Universe, as far as we can tell, has been **expanding** ever since the Big Bang.

Not just drifting outward — **accelerating**.

But **why** is it expanding faster?

And what’s it expanding *into*?

(Trick question — probably *nothing*. There’s no ā€œoutsideā€ to space-time.)

### ā“ A Bigger Question: What If Selection Drives Expansion?

Now for the bold idea:

> **Could the Universe be expanding because of selection?**

Not natural selection in the Darwinian sense, but a **broader concept**:

- Wherever **matter interacts**,

- Wherever **patterns emerge**,

- Wherever **choices are made**,

there’s **selection** — and selection may be the engine of **novelty**.

### 🧠 Here’s the Thought Experiment:

1. **Big Bang** happens → universe starts expanding.

2. **Complexity arises** — atoms, molecules, stars, life.

3. **Life generates novelty**, explores possibilities, selects paths.

4. **Selection** becomes embedded in physical processes.

5. That selection might be **linked to the flow of time** — and maybe even **fuels the expansion**.

Think of it as:

> **The more selection, the more expansion.**

Wherever *stuff* interacts and selects — from particles to consciousness —

**space inflates** to accommodate complexity.

### šŸ”„ But What Even *Is* Time?

Time, in this view, isn’t just a backdrop — it’s **active**, driven by **irreversible change**, the one-way arrow of causality.

And if time is real — and not reversible — then maybe **selection through matter** is what keeps the clock ticking.

And keeps the cosmos stretching.

### šŸ”¬ Is It Testable?

No, not yet. Maybe not ever.

But maybe we’ve been asking the wrong questions.

Instead of:

> ā€œWhat force is driving expansion?ā€

Try asking:

> ā€œWhat role does *novelty* play in the evolution of the cosmos?ā€

### 🧬 Life as Localized Selection

If selection per unit volume = life,

then maybe **life isn’t separate from the cosmos** — it’s just **one expression of the Universe’s selection process**.

That means:

- Even if no humans exist,

- Even if no Earth exists,

- **Wherever there’s interaction, there’s selection.**

And **where there’s selection… the Universe expands**.

### 🤯 Final Thought

This isn’t settled science. It might even be nonsense.

But **isn’t it thrilling** to wonder if your thoughts, your choices, your very existence

are *not just observers of the cosmos* —

but **contributors to its expansion**?

> What if we’re not just in the Universe…

> **What if we’re part of what keeps it growing?**

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