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Tag Archives: Earth

Famous theory of the living Earth upgraded to ‘Gaia 2.0’

A time-honoured theory into why conditions on Earth have remained stable enough for life to evolve over billions of years has been given a new, innovative twist. For around half a century, the ‘Gaia’ hypothesis has provided a unique way of understanding how life has persisted on Earth. It champions ...

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How to Show That the Earth Orbits the Sun

One of my favorite classes to teach is Physics for Elementary Education. It’s a physics class designed to address the needs of future elementary school teachers—grades 1 through 6 or so. To guide the class, I’ve been using a version of Next Gen Physical Science and Everyday Thinking for a ...

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The Guardian GT Is the Most Bonkers Robot on Earth

Like with jetpacks and flying cars, the Power Loader from Aliens is a robot we’ve been promised for a long time. That’d be the exoskeleton that Sigourney Weaver donned to beat the tar out of the movie’s eponymous alien Queen, of course. Jetpacks are kinda here, flying cars … almost, ...

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Space sound waves around Earth: Electrons whistle while they work?

Space is not empty, nor is it silent. While technically a vacuum, space nonetheless contains energetic charged particles, governed by magnetic and electric fields, and it behaves unlike anything we experience on Earth. In regions laced with magnetic fields, such as the space environment surrounding our planet, particles are continually ...

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Plants Might Have Saved Earth From Permanent Ice Age

In the last 800,000 years, Earth has chilled and thawed its way through eight ice ages, each lasting tens of thousands of years. But why? Why didn’t Earth just freeze the one time and stay that way? You’re glad it didn’t, because the periods between glaciations are when you get ...

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Methane muted: How did early Earth stay warm?

For at least a billion years of the distant past, planet Earth should have been frozen over but wasn’t. Scientists thought they knew why, but a new modeling study from the Alternative Earths team of the NASA Astrobiology Institute has fired the lead actor in that long-accepted scenario. Humans worry ...

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