Early Earth's Atmosphere Could Have Been Half As Thick As Today

Did the young Earth really have a more dense atmosphere, as the current theory goes? Researchers recently used bubbles trapped in rocks to demonstrate that the air 2.7 billion years ago exerted at the most only half the pressure of today’s atmosphere. According to a study published this week in the journal Nature Geoscience, the commonly accepted idea that the early Earth had a thicker atmosphere to compensate for weaker sunlight is wrong. [Read More]