Turning red-hot lava from an active volcano into electricity would be dangerous and unreliable. Volcanoes don’t erupt on predictable schedules, and lava cools too quickly. But many countries, including the U.S., have found ways to tap volcanic heat to make electricity.Geothermal energy comes from heat generated by natural processes deep within the Earth. In most areas, this heat only warms rocks and underground water near the surface. In volcanically active regions, however, the heat is much m ...read more

The past decade has seen a rapid expansion of the commercial space industry. Rival nations are competing for prime military and economic positions beyond the Earth. Public and private entities are clamoring tomine the Moon, and a growing halo of space junk is polluting low Earth orbit.In a 2023 white paper, a group of concerned astronomers warned against repeating Earthly “colonial practices” in outer space. But what’s wrong with colonizing space if there’s nothing there to begin with?I ...read more

Volcanoes are dangerous. Even when they aren't hurling rocks, ash and lava at you, they can release potential toxic gases, crumble beneath your feet or send slurries down their slopes to wipe you away. When you hike on a volcano, you need to be aware of that risk. I'm not saying you shouldn't visit volcanic places -- you should because they are some of the most amazing landscapes on Earth! However, satiating your desire for risk needs to be balanced with not become another death on a volcano.Yet ...read more

There was a time when giant cranes did not dot the city skyline and when bulldozers, backhoes, and excavators did not yet exist. But even before these pieces of seemingly critical technology were invented, we had palatial estates, temples, churches, pyramids, and the like, all of which were built with none other than human ingenuity.But how were these mega-structures of yesteryear built? Let’s take a closer look. 1. The Great Sphinx of Giza(Credit: gumbao/Shutterstock) The Great Sphinx of Giz ...read more

Most space mission systems historically have used one spacecraft designed to complete an entire mission independently. Whether it was a weather satellite or a human-crewed module like Apollo, nearly every spacecraft was deployed and performed its one-off mission completely on its own.But today, space industry organizations are exploring missions with many satellites working together. For example, SpaceX’s Starlink constellations include thousands of satellites. And new spacecraft could soon ha ...read more

Earth’s oxygen is something of a puzzle. Until recently, scientists believed it is produced entirely by photosynthesis — plants using sunlight to convert carbon dioxide and water into glucose and oxygen.But earlier this year, oceanographers discovered an entirely new source of oxygen. Deep in Earth’s oceans, they found oxygen levels much higher than can be explained by photosynthesis alone, which typically occurs near the surface where sunlight can penetrate.The researchers concluded that ...read more

When you think of a fearsome, sharp-toothed predator, a squid probably isn’t the first animal that comes to mind. But these complex creatures have sophisticated eyesight, a strong beak to crush shells, and agile tentacles that help them snatch up prey.Oh, and they have teeth in their suckers. The serrated teeth inside the suction cups on their tentacles allow them to latch onto prey.While most hard tissues in animals are mineralized, with calcium fortifying their bones, shells, or teeth, the s ...read more

Imagine being charged by a woolly mammoth. You hold a wooden spear with a razor-sharp stone tip. Do you hurl it at the 10,000-pound animal and hope it pierces its thick leathery skin? Or do you stay put, plant the base into the ground and trust that the beast will impale itself?The conventional wisdom — both scientific and cultural — has long favored the first version. But archeological evidence and an experimental approach shows that the second may have been more realistic and common during ...read more

Antlers are like giant, imposing cradles, sometimes stretching out from an animal’s head in a bowl-like shape with horns reaching for the sky.And there is variation in horns and antlers among many animals. In a recent study published in Communications Biology, researchers found that ruminant headgear may have evolved from a common ancestor that lived 15 million years to 20 million years ago.“There’s some sort of genetic predisposition that this family has towards ornamentation,” says Zac ...read more

Paleontologists have uncovered one of the best-preserved dinosaurs ever found in the United Kingdom on the Isle of Wight. In a recent study, the team presented Comptonatus chasei as a new species of iguanodontian that roamed Earth around 125 million years ago in the Early Cretaceous.The research team described it as one of the most complete fossil dinosaurs discovered in the U.K. in the last century; the last incredibly well-preserved specimen was also a species of iguanodon. It’s the latest i ...read more