Strata: Stories from Deep Time’ explores the origins of the air we breathe and untangles some of our planet’s oldest stories.

The events that brought the raised fist back to the United States as a symbol of the fight against racial oppression began earlier that year in Spain.

Rockets carry an oxidizer, often in the form of liquid oxygen, to burn their engine fuel. That’s the fundamental difference between rockets and jets; the latter get oxygen from the air.

Developing metal-free catalysts for oxygen reduction reaction (ORR) is a great challenge in the development of fuel cells. Nitrogen and sulfur codoped carbon with remarkably high nitrogen content up ...

SUMMARY OF KEY RECOMMENDATIONS FOR EMERGENCY OXYGEN USE Achieving desirable oxygen saturation ranges in acute illness (sections 6.7 and 6.8) This guideline recommends aiming to achieve a normal or ...

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The strength of Earth’s magnetic field and the amount of oxygen in its atmosphere seem to be correlated—and scientists want ...

Download this Flammable Liquid Un 1993 Compound Cleaning Liquid Symbol Sign Vector Illustration Isolate On White Background Label Eps10 vector illustration now. And search more of iStock's library of ...

Map shows cheapest and most expensive states to retire comfortably A logging protest in the treetops ends in terror, activists say Extreme heatwave hits Europe as temperatures soar above 40C in ...

China brought back hydrogen-oxygen engine Between the end of 2024 and the start of 2025, China quietly made a significant breakthrough. The y te st-fired a brand-new 220-ton hydrogen-oxygen rocket ...