Mars could have lived, even without a magnetic fieldMars and Earth’s differing planetary evolutions are primarily due to Mars's smaller size, leading to quicker core cooling and magnetic dynamo loss.
NASA Discovers Invisible Field Around EarthScientists have discovered a weak, planet-wide electric field, previously hypothesized, which may influence Earth's evolution and the search for hospitable exoplanets.
Volcanoes on Venus Might Be Erupting Right NowVenus is more geologically active than previously thought.