Featured series 
Tag: early Earth
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Nation & World
Earth may have been a water world 3 billion years ago
A new study suggests Earth’s primordial ocean 3 to 4 billion years ago may have been much larger than it is today, and possibly covered the entire planet.
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Nation & World
A role for cyanide in recipe for life
New Harvard findings show that a mixture of cyanide and copper, when irradiated with UV light, could have helped form the building blocks of life on early Earth.
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Nation & World
Mars rover, slightly used, runs fine
Originally scheduled to operate on the Red Planet’s surface for 90 Martian days, the rover Opportunity has now logged more than 3,500 days, traveled nearly 39 kilometers, and collected a trove of data that scientists have used to study the planet’s early history, particularly any past traces of water.
