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Planetary Sciences 21 hours ago

How the current Southwestern North American megadrought is affecting Earth's upper atmosphere

New research, based on two decades' worth of data, shows that in the ten years after its onset in 2000, the Southwestern North American (SWNA) megadrought caused a 30% change in gravity wave activity in Earth's upper atmosphere.

Mathematics 22 hours ago

Statistics star number crunches Christmas, shows how math can help your decorations look tree-mendous

The festive countdown is in full swing and numbers are uppermost in mind, as people manage tighter budgets and fill their social calendars with long-awaited gatherings now the worst of the COVID-19 pandemic has passed.

Plants & Animals Dec 06, 2022

Sea urchins have invaded Tasmania and Victoria, but people can't work out what to do with them

While crown-of-thorns starfish on the Great Barrier Reef have long been ecological villains in the popular imagination, sea urchins have mostly crawled under the national radar—until now.

Space Exploration Dec 05, 2022

NASA capsule flies over Apollo landing sites, heads home

NASA's Orion capsule and its test dummies swooped one last time around the moon Monday, flying over a couple Apollo landing sites before heading home.

Astronomy Dec 05, 2022

In Australia and South Africa, construction has started on the biggest radio observatory in Earth's history

Construction of the world's biggest radio astronomy facility, the SKA Observatory, begins today. The observatory is a global project 30 years in the making.

Astronomy Dec 05, 2022

Giant mantle plume reveals Mars is more active than previously thought

On Earth, shifting tectonic plates reshuffle the planet's surface and make for a dynamic interior, so the absence of such processes on Mars led many to think of it as a dead planet, where not much happened in the past 3 billion ...

Plasma Physics Dec 05, 2022

Simulations predict the existence of black hole radio-wave hot spots

Black holes, regions in spacetime where gravity is so strong that nothing can escape from them, are among the most fascinating and widely studied cosmic phenomena. While there are now countless theories about their formation ...

Astronomy Dec 02, 2022

New analysis approach could help boost sensitivity of large telescopes

Some of the largest and most sophisticated telescopes ever made are under construction at the Simons Observatory in Northern Chile. They are designed to measure cosmic microwave background—electromagnetic radiation left ...

Astrobiology Dec 01, 2022

Should we build a nature reserve on Mars?

There are 8 billion of us now. The UN says when the population peaks around the year 2100, there'll be 11 billion human souls. Our population growth is colliding with the natural world on a greater scale than ever, and we're ...

Space Exploration Dec 01, 2022

With a small network of satellites around Mars, rovers could navigate autonomously

When it comes to "on the ground" exploration of Mars, rovers make pretty good advance scouts. From Pathfinder to Perseverance, we've watched as these semi-autonomous robots do what human explorers want to do in the future. ...

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