Living thingsShort read
An octopus's three hearts work as a team.
There is more to the surprising number: each heart has a job.
Text: ~1 min · 2026.10.29Revisit the sources ↗
Living things
From an everyday question to the next discovery.
Three hearts: one circulates blood around the body, and two send it to the gills.
In editorial order. You can move to another field at any time.
1–4 of 4 articlesPage 1 of 1
Living things
When did life begin? How tiny cells changed a planet
Rock patterns, dividing membranes, shared ancestry and rising oxygen tell different stories. Learn to read their evidence while exploring life’s unresolved origins and the world transformed by microbes.
Text: ~9 min · 2026.11.06Revisit the sources ↗
Living things
Why is life so varied? Branching bodies and mass extinctions
Visit Cambrian seas, expanding life on land and two mass extinctions. Comparing the recoveries reveals a history of changing bodies, environments and relationships, with no single path toward a superior organism.
Text: ~9 min · 2026.11.06Revisit the sources ↗
Living things
Did humanity evolve along a single path?
Footprints, bones, tools and DNA reveal different parts of our past. Combine them, and a single procession becomes a history of branching lineages, movement and encounters.
Text: ~9 min · 2026.11.06Revisit the sources ↗