Science, Spoken

Dark energy, mysterious as it sounds, has become part of the furniture in cosmology. The evidence that this repulsive energy infuses space has stacked up since 1998. That was the year astronomers first discovered that the expansion of the universe has been speeding up over time, with dark energy acting as the accelerator. As space expands, new space arises, and with it more of this repulsive energy, causing space to expand even faster. Learn about your ad choices: dovetail.prx.org/ad-choices

For many of us, winter, with its chilly days and long nights, brings with it a general sense of malaise. It’s harder to peel ourselves out of bed in the half-light of morning, and hunched over our desks at work, we can feel our productivity draining away with the remnants of the afternoon sun. Wired UK This story originally appeared on WIRED UK. Learn about your ad choices: dovetail.prx.org/ad-choices

Babies love it, and Galileo supposedly tried it: Drop some objects from on high, and see how fast they fall. According to Einstein’s theory of general relativity, all objects in Earth’s gravity, regardless of mass, should descend at the same rate in the absence of air resistance. But there are plenty of reasons to believe this might not be true. Learn about your ad choices: dovetail.prx.org/ad-choices

There's a rare human trait that doesn't often make it into debates about what makes our species unique: menopause. Humans are among just a handful of species where females stop reproducing decades before the end of their lifespan. In evolutionary terms, menopause is intriguing: how could it be advantageous for reproductive ability to end before an individual's life is over? One possible answer: the power of the grandma's guidance and aid to her grandchildren. Learn about your ad choices: dovetail.prx.org/ad-choices

Just about a year ago, SpaceX sent the rocketry equivalent of a clown car to space: A rocket crowded with more than 60 small satellites. Inside one of them, Excite, were even more. It was actually a satellite made of other satellites, all clones of each other, all capable of joining together and working together. It was one of the first in-space tests of such a contraption—but in the coming years, this modular approach is likely to show up on more and more missions. Learn about your ad choices: dovetail.prx.org/ad-choices

This story originally appeared on Yale Environment 360 and is part of the Climate Desk collaboration. From 2011 to 2016, California experienced five years of extreme drought, during which numerous high temperature records were broken. These hot, dry years were followed by the extremely wet winter of 2016 -2017, when, from October to March, an average of 31 inches of rain fell across the state, the second highest winter rainfall on record. Learn about your ad choices: dovetail.prx.org/ad-choices

At this very moment, you're a participant in one of the things that makes us human: the telling and consumption of stories. It's impossible to say when our species began telling each other stories—or when we first evolved the ability to use language to communicate not only simple, practical concepts but to share vivid accounts of events real or imagined. But by 43,900 years ago, people on the Indonesian island of Sulawesi had started painting some of their stories in images on cave walls. Learn about your ad choices: dovetail.prx.org/ad-choices

It’s a brisk December morning at Spaceport Tucson, America’s premiere (only?) dedicated launch pad for stratospheric balloons, and a small army of technicians in reflective vests is milling around on the concrete and dethawing after a long, cold night. Nearby, a white metal tripod the size of a smart car is tethered to two dozen solar panels and hundreds of feet of clear plastic that stretches across the pad. Learn about your ad choices: dovetail.prx.org/ad-choices

This story originally appeared on Undark and is part of the Climate Desk collaboration. When most people conjure a forest, they imagine a dense network of trees, their crowns arching high above, with spots of sunshine flashing between the leaves. Some might also think of birdsong and insects, or summon thoughts of thick foliage in the understory, the crunch of leaves or pine needles underfoot, or overgrown trails meandering into the thicket. Learn about your ad choices: dovetail.prx.org/ad-choices

The practice of science is about progress: Crafting knowledge out of hunches and experiments, finding life-saving remedies, informing sound policies. It doesn't always go as planned. Learn about your ad choices: dovetail.prx.org/ad-choices