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As if we didn’t have enough reasons to get at least eight hours of sleep, there is now one more. Neurons are still active during sleep. We may not realize it, but the brain takes advantage of this recharging period to get rid of junk that was accumulating during waking hours.

Sleep is something like a soft reboot. We knew that slow brainwaves had something to do with restful sleep; researchers at the Washington University School of Medicine in St. Louis have now found out why. When we are awake, our neurons require energy to fuel complex tasks such as problem-solving and committing things to memory. The problem is that debris gets left behind after they consume these nutrients. As we sleep, neurons use these rhythmic waves to help move cerebrospinal fluid through brain tissue, carrying out metabolic waste in the process.

In other words, neurons need to take out the trash so it doesn’t accumulate and potentially contribute to neurodegenerative diseases. “Neurons serve as master organizers for brain clearance,” the WUSTL research team said in a study recently published in Nature.

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In the summer of 2017, when communication professor Jeffery Gentry moved from Oklahoma to accept a position at Eastern New Mexico University, he was pleasantly surprised to find it easier to get up in the morning. The difference, he realized, was early morning light. On September mornings in Portales, New Mexico, Gentry rose with the sun at around 6:30 am, but at that time of day in Oklahoma, it was still dark.

As the Earth rotates, the sun reaches the eastern edge of a time zone first, with sunrise and sunset occurring progressively later as you move west. Gentry’s move had taken him from the western side of Central Time in Oklahoma to the eastern edge of Mountain Time. Following his curiosity into the scientific literature, he discovered the field of chronobiology, the study of biological rhythms, such as how cycles of daylight and dark affect living things. “I really just stumbled upon it from being a guinea pig in my own experiment,” he said.

In 2022, Gentry and an interdisciplinary team of colleagues added to that body of research, publishing a study in the journal Time & Society that showed the rate of fatal motor-vehicle accidents was highest for people living in the far west of a time zone, where the sun rises and sets at least an hour later than on the eastern side. Chronobiology research shows that longer evening light can keep people up later and that, as Gentry found, morning darkness can make it harder to get going for work or school. Western-edge folks may suffer more deadly car wrecks, the team theorized, because they are commuting in the dark while sleep deprived and not fully alert.

Enlarge / In this photo illustration, melatonin gummies are displayed on April 26, 2023, in Miami, Florida. (credit: Getty | Joe Raedle)

Federal regulators have long decried drug-containing products that appeal to kids—like nicotine-containing e-cigarette products with fruity and dessert-themed flavors or edible cannabis products sold to look exactly like name-brand candies.

But a less-expected candy-like product is sending thousands of kids to emergency departments in the US in recent years: melatonin, particularly in gummy form. According to a new report from researchers at the Centers for Disease Control and Prevention, use of the over-the-counter sleep-aid supplement has skyrocketed in recent years—and so have calls to poison control centers and visits to emergency departments.

Melatonin, a neurohormone that regulates the sleep-wake cycle, has become very popular for self-managing conditions like sleep disorders and jet lag—even in children. Use of melatonin in adults rose from 0.4 percent in 1999–2000 to 2.1 percent in 2017–2018. But the more people have these tempting, often candy-like supplements in their homes, the more risk that children will get ahold of them unsupervised. Indeed, the rise in use led to a 530 percent increase in poison control center calls and a 420 percent increase in emergency department visits for accidental melatonin ingestion in infants and kids between 2009 and 2020.

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Comcast waited as many as nine days to patch its network against a high-severity vulnerability, a lapse that allowed hackers to make off with password data and other sensitive information belonging to 36 million Xfinity customers.

The breach, which was carried out by exploiting a vulnerability in network hardware sold by Citrix, gave hackers access to usernames and cryptographically hashed passwords for 35.9 million Xfinity customers, the cable TV and Internet provider said in a notification filed Monday with the Maine attorney general’s office. Citrix disclosed the vulnerability and issued a patch on October 10. Comcast didn't patch its network until October 16 at the earliest and October 19 at the latest, a lapse of six to nine days. On October 18, researchers reported that the vulnerability, tracked as CVE-2023-4966 and by the name Citrix Bleed, had been under active exploitation since August.

“However, we subsequently discovered that prior to mitigation, between October 16 and October 19, 2023, there was unauthorized access to some of our internal systems that we concluded was a result of this vulnerability,” an accompanying notice stated. “We notified federal law enforcement and conducted an investigation into the nature and scope of the incident. On November 16, 2023, it was determined that information was likely acquired.”

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What do Boeing, an Australian shipping company, the world’s largest bank, and one of the world’s biggest law firms have in common? All four have suffered cybersecurity breaches, most likely at the hands of teenage hackers, after failing to patch a critical vulnerability that security experts have warned of for more than a month, according to a post published Monday.

Besides the US jetliner manufacturer, the victims include DP World, the Australian branch of the Dubai-based logistics company DP World; Industrial and Commercial Bank of China; and Allen & Overy, a multinational law firm, according to Kevin Beaumont, an independent security researcher with one of the most comprehensive views of the cybersecurity landscape. All four companies have confirmed succumbing to security incidents in recent days, and China’s ICBC has reportedly paid an undisclosed ransom in exchange for encryption keys to data that has been unavailable ever since.

Citing data allowing the tracking of ransomware operators and people familiar with the breaches, Beaumont said the four companies are among 10 victims he’s aware of currently being extorted by LockBit, among the world’s most prolific and damaging ransomware crime syndicates. All four of the companies, Beaumont said, were users of a networking product known as Citrix Netscaler and hadn’t patched against a critical vulnerability despite a patch being available since October 10.

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Ford Motor Company had a better idea, as it once advertised, producing such iconic cars as the Mustang, Bronco, Thunderbird, and Model T. But it also built the ill-fated Edsel. Ford wasn't alone, either; many inventors and engineers have produced cars that seemed like a good idea until they actually acted on it. Here are a few examples.

1899 Horsey Horseless

Kellogg's cereal wasn't the only product to emanate from Battle Creek, Michigan. The Horsey Horseless also came from there, although it's unknown whether this vehicle was ever actually built. Still, it was a solution to a common problem in the early days of motoring, when automobiles were still uncommon and scared horses. Uriah Smith thought that sticking a horse head on the front of a horseless carriage would prevent horses from getting upset upon seeing one.

"It would have all the appearance of a horse and carriage and hence raise no fears in any skittish animal," he wrote. "Before he could discover his error and see that he had been fooled, the strange carriage would be passed, and then it would be too late to grow frantic and fractious."