Tag: sea urchins
War on Human Exceptionalism Turns to Tool Use
As the academic war on human exceptionalism motors on, researchers’ thinking sometimes shorts out — and they don’t even notice.
A Remarkably Candid Statement About an Unsolved Evolutionary Puzzle
According to current systematic theory, everyone reading this right now belongs to the taxonomic category Deuterostomia.
Applying the Design Filter to Biological Sands
If you look closely at beach sand, you may find some grains that stand out. They are shaped like spirals, stars, or striated cones.
By Design — How Pearls Get Their Luster
The highly valued optical properties of pearls come from sophisticated processes of biomineralization involving proteins and crystals.
Placozoa: An Evolutionary Leftover?
Simple, small, and worldwide in distribution, the placozoa don’t fit any clear evolutionary picture.