How plants drove animals to the land

(PhysOrg.com) -- A new study of ancient oxygen levels presents the first concrete evidence that after aquatic plants evolved and boosted the levels of oxygen aquatic life exploded, leading to fierce competition that eventually ...

How a mint became catmint

Catmint, also known as catnip, is well-known for its intoxicating effect on cats. The chemical responsible for the cats' strange behavior is nepetalactone, a volatile iridoid produced by catmint. An international team of ...

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