• Updated

It's one of the biggest unanswered questions as electric vehicles (EVs) rapidly proliferate: What will happen to all of the degraded lithium-ion batteries once the vehicles reach the end of their lives? "Recycling" is the optimistic solution offered by EV advocates and supporters of green technology, but will battery recycling actually make economic and environmental sense?

Archimedes of Syracuse is generally regarded as one of the greatest mathematicians who ever lived. So revered was his wisdom and celebrated his legacy that legendary scholars who lived nearly two millennia after Archimedes' death in 212 BC hailed him across the ages. Galileo called him "superhuman". Gottfried Wilhelm Leibniz remarked that he spoiled genius itself. Christiaan Huygens said that Archimedes was "comparable to no one".

  • Updated

In the past few decades, dog trainers have overwhelmingly switched to practicing and recommending reward-based training for dogs rather than aversive training. Rewarding your pooch with treats, toys, or attention when they behave well and denying those things when they don't seems to be more effective and salubrious instead of employing aversive methods like spraying water, yanking on their leash, or using a shock collar to punish unwanted behaviors. Scientific studies are now providing empirical evidence in favor of reward-based training.

Praying mantises are perhaps the most distinct and fearsome predators of the insect world. Their ambush-style attacks are comparable to those of lions and tigers. But, as a recent study published to PeerJ reveals, despite their size and ferocity, praying mantises fall short when it comes to predating on bombardier beetles. Why? As their name suggests, these beetles have an explosive trick up their sleeves, or rather, their bums.

  • Updated

America is plagued by a couple notable gaps in life expectancy. The rich live much longer than the poor, and European Americans live roughly 3.6 years longer than African Americans. These wealth- and race-based disparities have persisted for decades.

  • Updated

For many people who contract mild, moderate, or severe COVID-19, the disease's effects don't disappear when the infection fades. A systematic review and meta-analysis published Monday to the journal Scientific Reports found that 80% of cases result in at least one long-term symptom.

At the center of the Milky Way exists a supermassive black hole four million times more massive than our sun. We haven't actually seen it, but we know it's there through numerous pieces of evidence. One, there's an extremely bright and compact radio signal coming from that location. Two, astronomers have observed dozens of stars dancing around it at high speeds. And three, in 2018, scientists detected clumps of gas nearby moving at about 30% the speed of light, consistent with hot gas orbiting a black hole.

Humans' knack for consuming alcohol dates back around ten million years, long before Homo sapiens were a distinct species. A single gene mutation granted our evolutionary ancestors an enhanced ability to break down ethanol – drinking alcohol. Suddenly, some individuals could metabolize the alcohol from fermenting fruits on forest floors, converting it to energy and alleviating its toxic, incapacitating effects. Over time, these individuals survived and procreated more often, gradually granting almost all humans alcohol-imbibing abilities.

Humans' knack for consuming alcohol dates back around ten million years, long before Homo sapiens were a distinct species. A single gene mutation granted our evolutionary ancestors an enhanced ability to break down ethanol – drinking alcohol. Suddenly, some individuals could metabolize the alcohol from fermenting fruits on forest floors, converting it to energy and alleviating its toxic, incapacitating effects. Over time, these individuals survived and procreated more often, gradually granting almost all humans alcohol-imbibing abilities.