Oxygen fuels the fires of time

Variations in the Earth's atmospheric oxygen levels are thought to be closely linked to the evolution of life, with strong feedbacks between uni- and multicellular life and oxygen. Over the past 400 million years the level ...

Unexpected amber find rewrites botanical history

(PhysOrg.com) -- An unexpected discovery made by Macquarie University PhD student Sargent Bray about the origin and nature of chemical compounds contained in ancient amber has changed our understanding of when modern flowering ...

page 2 from 2