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The crater lies deep beneath the Atlantic Ocean and was formed around 66 million years ago – making it a contemporary of Chicxulub. It is thought that the asteroid hit Earth at around 72,000 kilometers (44,700 miles) per hour. Image credit: muratart/Shutterstock.com Some 66 million years ago, a massive asteroid slammed into Earth. The Chicxulub impactor, as it is called, famously wiped out the non-avian dinosaurs and left a huge crater at the edge of the Yucatán peninsula – but it may not have acted alone. New research has revealed that a second, smaller space rock smashed into our planet...

The unmistakable work of prehistoric humans was found etched into the mammoth's hide. Yuka the mammoth may have been killed by cave lions. Image credit: Zhuravlev Andrey/Shutterstock.com Often hailed as the best-preserved woolly mammoth corpse ever discovered, the body of a young female specimen named Yuka has just yielded a staggering surprise. By analyzing cut marks on the animal's hide, researchers have now determined that the beast was butchered by humans 39,000 years ago, thus providing the earliest evidence for the presence of people in the Arctic. Discovered in 2010 in the extreme north of Siberia, Yuka is thought to...

In a couple of weeks, Earth will have a mini-moon for 56.6 days. Welcome to the neighborhood, 2024 PT5. Image credit: Buradaki/Shutterstock.com An asteroid heading towards Earth is set to have an unusual fate: instead of smashing through our planet’s atmosphere, it’s likely to become trapped in orbit and become a mini-moon. It will be a swift visit, however, and is likely to only remain in Earth's gravitational grasp for two months. The asteroid, named 2024 PT5, was discovered on August 7 and measures around 10 meters (33 feet) in diameter. Two astronomers from the Complutense University of Madrid, Carlos...

The carvings at Göbekli Tepe even show the movements of the constellations. Image credit: Dr Martin Sweatman Acataclysmic comet impact 13,000 years ago may have sparked the rise of civilization, according to the authors of a new study. The event – which many scientists believe never happened – may even be documented at the world-famous site of Göbekli Tepe, forming part of a series of carvings that the researchers say represent the world’s oldest solar calendar. Located in southern Türkiye, Göbekli Tepe is a pre-pottery Neolithic complex that is estimated to be around 12,000 years old. Analyzing an intricately carved...

It looks like the original explanation for where Homo floresiensis came from was right all along. The Hobbit humerus fragment (left) from Mata Menge next to one from Liang Bua to scale, and the full collection of bones from the most complete Liang Bua Hobbit. Image Credit: Yousuke Kaifu ================================================================================ Three new fossils, including part of a humerus, have been found at Mata Menge on the Indonesian island of Flores. They indicate that Homo floresiensis, popularly known as Hobbits, were descended from Homo erectus, and became small relatively soon after arriving on Flores. Indeed, it seems at least some Hobbits...

Women who have sex less than once a week may be more likely to die early than those who engage in more regular intercourse, according to the results of a new study. While this same impact was not observed in men, the researchers did note that more frequent sex reduces the chances of an early grave in both men and women with depression. “Sexual activity is important for overall cardiovascular health possibly due to reduction of heart rate variability and blood flow increase,” write the authors. “Using findings from our study, we can infer that sexual activity, broadly defined, may...

Not all fat cells are bad. Image credit: Nilang Kachare/Shutterstock.com ================================================================== Scientists have figured out a way to transform white fat cells into beige ones, effectively forcing them to burn calories rather than store them. Though the feat has so far only been achieved in mice, the researchers say their discovery could lead to the development of new weight-loss treatments for humans. We all have three basic types of fat cell - white, brown and beige. White fat cells store lipids and cause us to gain weight when we have too many of them. Brown fat cells, on the other...

People also often try to simply change the topic of conversation. Image credit: zeljkodan/Shutterstock.com ================================================================== Eating too much meat is bad for you, bad for the environment, and fatal for the animals involved. Those are straight facts, indisputable and proven through years of study. But counterpoint: have you considered that vegans are annoying? If the comments section under just about any media promoting a vegetarian or vegan diet is anything to go by, the answer to that question is probably “yes”. And, in any case, what about all the poor plants, huh? You okay with murdering them, IFLScience? The blood...

Polyamory has been on the rise for some time, despite the social and political stigmas surrounding it, but research suggests that such romantic relationships can offer emotional and physical benefits to all involved. Consensual polyamory – having more than one sexual or emotional relationship at once – has become increasingly common in many countries in recent years. According to statistics published in 2021, 4 to 5 percent of the American population practices polyamory, while a 2019 YouGov survey found that 7 percent of UK adults had been in a consensual non-monogamous relationship at some point in their lives. This latter...

These results are a step forward in finding a vaccine against HIV and many other pathogens.Researchers report the positive results from a Phase 1 clinical trial focused on a vaccine against the Human Immunodeficiency Virus (HIV). The pathogen does not usually produce an immune response large enough to stop it, which has made it a dangerous and deadly virus. One of the goals in the creation of a vaccine is to find a formula that would indue the so-called broadly neutralizing antibodies (bnAb), an immune response that can step up to the challenge. And the trial shows that this vaccine...