Latest Noah Planavsky Stories
Geologists are letting the air out of a nagging mystery about the development of animal life on Earth.
Discovery challenges previous models for environment in which early life evolved.
A spike in ancient marine phosphorus concentrations from 750 to 635 million years ago is linked to emergence of complex life, UC Riverside researchers say.
- An uxorious, effeminate, or spiritless man.
- A timorous, cowardly fellow.