biology
The superb lyrebird can reproduce camera shutters, chainsaws, and the calls of 20 other bird species — with enough fidelity that ornithologists routinely mistake the recordings.
postgres
One per-database row, two dozen counters, and most of the operational signals you actually need. pg_stat_database is the highest-leverage observability view Postgres ships.
api-design
Standardized headers exist for telling customers to slow down. Most APIs implement them inconsistently, which means most customer code ignores them.
history
Before mechanical clocks, before public address systems, before sirens and pagers and phones, the bell was the public broadcast medium. Its physics took 3000 years to refine.
biology
Painted turtles can survive four months without oxygen, an order of magnitude longer than any other vertebrate. The biochemistry is one of the strangest case studies in animal physiology.
postgres
Bad query plans almost always trace back to stale or insufficient statistics. ANALYZE is one of the simplest Postgres operations and one of the most overlooked.
api
Sandbox modes fail when they ship uniform mock data. Real customer integrations exercise edge cases, and sandbox data needs to surface those edges before production does.
history
The loom is one of the oldest continuously developed technologies in human history. Its 8000-year arc from backstrap to power loom contains most of the structural patterns of technological history.
api-design
Customer-facing event logs are how customers debug their integrations and recover from missed webhooks. Designing them well means treating them as a primary product surface, not a secondary debugging convenience.
history
The sextant was one of the most precise mechanical instruments ever made for non-laboratory use. It solved latitude exactly and longitude approximately for two centuries before electronic navigation displaced it within a generation.
biology
Reindeer have functional UV vision down to about 320 nanometers, a capability lost in most mammals and unique among large vertebrates. The selection pressure that produced it is hiding in plain sight in arctic ecology.
postgres
pg_dump's default settings are designed for small databases and reliability. On large databases they produce backups that take longer than they need to and restores that take orders of magnitude longer than they could.