What's Earth's dominant species by mass?
- ID
- 32777
- Status
- summarized
- Published
- 06 Oct 2026, 8:40 PM
- Fetched
- 07 Oct 2026, 10:41 PM
- Provider
- Hacker News
- Category
- dev-community
- Original URL
- https://signoregalilei.com/2026/09/27/whats-earths-dominant-species-by-mass/
- Source URL
- https://hnrss.org/best
Summary
- Score
- 2.0
- Created
- 07 Oct 2026, 10:42 PM
- Tags
- Audience
- developers
What happened
A Hacker News-linked blog post works through which single species has the most biomass on Earth, correcting the popular claim that ants outweigh humans (the post says humans outweigh ants 5 to 1). It puts humans at roughly 350 million metric tons, Antarctic krill at 379 million tons from a 2009 estimate, cattle at 650 million tons (about 61 million tons of carbon), and pigs at 140 million tons. On the carbon-mass basis used by Bar-On et al. 2018, animals total ~2 billion tons of carbon, far behind bacteria (70 billion) and plants (450 billion), with maize the largest annual grain harvest at 1.1 billion tons and sugar cane the largest crop overall.
Why it matters
There is no decision, migration, price change, or tooling implication here for developers, AI learners, or founders — it is a science-explainer post, not news you act on. The only transferable bit is a measurement lesson: the article shows the same question producing different rankings depending on whether you count wet mass or carbon mass, which is the kind of unit-of-measure ambiguity that also bites analytics and capacity-planning work.
Discussion angle
Ask the room which metric they would trust in their own dashboards — the post's wet-mass vs carbon-mass split is a clean, low-stakes example of how the definition of a unit changes who 'wins' a comparison.