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NASA finds strange magnetic impulses on Mars




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Do you notice a strange magnetic impulse? They must be on Mars by midnight. At least, that's what NASA's InSight Lander finds searching the planet for clues to its history, National Geographic . The robot geophysicist who records tremors, measures soil temperatures, etc., also says that the Earth's crust has much more magnetism than expected. "We get an insight into the magnetic history of Mars in a way we've never had before," says a Planetary Geologist. First, a primer: Earth and Mars each have a magnetic field. The earth is caused by a liquid, iron-rich outer core that has been shifting for a long time. Unfortunately, the field of Mars collapsed about four billion years ago, becoming a much weaker version of itself.

That meant that Mars could no longer be protected from the sun's rays or the solar wind that destroyed much of the planet's atmosphere. According to InSight, the magnetism of Mars is about 20 times stronger than expected, suggesting that its magnetic field lasted longer than the scientists had thought. Strangely, the pulses occur at midnight local time. Maybe that's because the solar wind creates a faint magnetic bubble as it strikes the thin atmosphere of the planet, which is compressed into a kind of tail shape ̵

1; and InSight focuses on that tail at midnight. InSight has also found an electrically conductive layer well below the Martian surface that, according to Big Think, could be a planet-wide water reservoir about 4 km thick. And that could mean life, either current or long gone. (Read more about Mars stories.)

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