Sustainability has two forces and one revolution

Why the marriage of flow and efficiency works for systems sustainability 

A BiosVerse™ hack

Sustainability is a poor term for defining and understanding what works in the long term within an ecosystem. Nature uses time-tested designs and execution methods to achieve cost-effective (fewer calories for a unit of work) and resilient systems that give us incredible insights into making things and developing compatible behaviors. It will also reject incompatible behaviors and the stuff we make over time, relatively quickly in some instances and spanning generations in others (e.g., microplastics in the brain, CO2-producing activities, DDT, PFAS, etc.).

The hamster-on-a-treadmill story

Imagine your little brother’s hamster running like crazy on its wheel. Now think about an elephant strolling around the zoo. The hamster is tiny but burns fuel (food) way faster for each gram of body mass than the elephant does. That weird fact puzzled scientists for a century.

They wrote it down with fancy symbols — “energy use grows as body size to the three-quarters power” — but the plain-English version is: “When living things get bigger, they need more energy, but not as much more as you’d expect. The bigger they are, the cheaper each gram is to keep alive.”

A mouse is like driving a sports car in first gear; an elephant is cruising on the highway in sixth, fewer revs per mile.

The world’s best delivery network

Why does size buy you that bargain?

Think of your body as DoorDash for oxygen and food. One “restaurant” (your heart & lungs) has to feed billions of hungry “customers” (your cells) every second. It does this with a branching road system: big highways (arteries) become smaller streets (arterioles) that finally become skinny footpaths (capillaries).

That pattern — big tube → smaller → smaller — shows up everywhere nature must move stuff fast:
• River deltas split into many streams.
• Tree trunks divide into branches, twigs, and leaves.
• Even lightning cracks into forks to spread charge.

Those shapes aren’t random art; they’re Mother Nature keeping traffic jams away. The physics law behind them is called the Constructal Law, first posited by Dr. Adrian Bejan of Duke University: Simplifying it: “Any flow system that sticks around will keep rearranging itself to make movement easier.”

How 1 physics rule and 1 physics law high-five each other

1. Constructal Law says networks evolve toward more effortless flow.

2. Kleiber’s “¾ rule” is the scorecard that shows how well an animal has done the job.
- If the network is laid out just right, a bigger body gets more bang for its buck — three-quarter style.
- Mess up the design, and the score shifts.

3. So: easy-flow systems and physical architecture means→ cheaper energy cost → the hamster-vs-elephant pattern. They’re two sides of the same coin. And that coin buys us an entry ticket to the BiosVerse™.

4. Everyday Metaphors You Already Know That Result in Profitable Outcomes

Nature’s Trick Human Twin

River branches keep water moving without floods. City planners add ring roads so traffic can dodge downtown.

Tree roots spread to grab water efficiently. Wi-Fi routers use mesh networks, so every phone gets a strong signal.

Animal arteries split to feed cells cheaply. Computer chips carve tiny channels to whisk away heat with minimal power.

Whenever you see something branch, fork, or fan out, it’s usually chasing the same “move it easier” prize.

5. Why Engineers & Designers Should Care About BiosVerse™ Compatibility
• Battery life dreams: Phones with better heat-moving paths can run harder chips without melting — same idea as efficient elephant blood flow.
• Eco houses: Heat-pump tubing laid out like tree roots saves electricity.
• Sports training: Small animals’ faster heartbeats and shorter lifespans pop right out of the rule; coaches use that logic to compare fitness across players.
• Game design/sims: Want realistic cities or alien ecosystems? Code the constructal rule and watch believable patterns grow by themselves.

What, why, and how

• Kleiber’s Rule (E= M¾ power) tells us what happens: big critters are energy miserly per gram.
• Constructal Law explains why: branching delivery networks keep tweaking themselves to cut traffic jams.
• Together they’re a ready hack for spotting (and building) anything — living or mechanical — that moves stuff smartly. Biomimetics is finding the how!

The next time you watch rain carve channels in mud, or notice the veins on a leaf, you’re seeing the same playbook that lets elephants out-thrift hamsters. Whatever you are working on, design it to flow easily and build it to save energy — become part of an industry expanding rapidly and learn from members discovering, employing, and using nature’s favorite Bios (life) hacks.