Uncategorized
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- Paleontology
Oxygen blew up ancient amoebas
Single-celled creatures' size spiked as oxygen levels rose.
- Health & Medicine
A mind for optimism
When predicting the risk of unfortunate events, people heed positive news better than ill tidings.
- Earth
Trees have a tipping point
Satellite data confirm that the amount of forest cover can shift suddenly in response to relatively small changes in fire frequency and rainfall.
- Humans
Stone Age paint shop unearthed
The discovery of tools for making a substance possibly used in body decoration suggests humans could invent and plan by 100,000 years ago.
