Scienceblogtwo

The oldest representative species of humanity, Sahelanthropus tchadensis, was bipedal, according to a recent study. Bipedalism is thought to have been the tipping point in human evolution. Although there are no fossilized remains, there is controversy on its methods and age. Three limb bones from Sahelanthropus tchadensis, the earliest known member of the human genus, were examined by scientists from the University of Poitiers, the French National Centre for Scientific Research (CNRS), and its collaborators in Chad. The study, which was just published in the journal Nature, lends support to the idea that bipedalism emerged very early in the history of humanity, when it was still thought that people could only travel on four limbs in trees. At the PALEVOPRIM laboratory in Poitiers (CNRS/University of Poitiers), Franck Guy (left) and Guillaume Daver (right) are working on a collection. Franck Guy is to be credited with Paleoprim, CNRS, and the University of Poitiers. With a 7 million-yea...

Immature human egg cells skip a crucial metabolic pathway thought to be important for generating energy, according to research from the Center for Genomic Regulation (CRG) that was published in the journal Nature. The metabolism of the cells is altered to halt the production of reactive oxygen species, which are harmful chemicals that can build up, harm DNA, and result in cell death. The study reveals how human egg cells can remain fertile while latent in the ovaries for up to 50 years. "Humans are born with their entire lifetime's worth of egg cells. Humans are the only terrestrial mammals who live the longest, thus egg cells must preserve their immaculate state while avoiding a lifetime of wear and tear. We demonstrate that this issue can be resolved by omitting a crucial metabolic process that is also the primary cause of cell damage. It functions similarly to turning on standby mode on batteries as a long-term maintenance method. The study's first author, Dr. Aida Rodr...

For many parents, making sure kids eat their vegetables and go to bed on time goes hand in hand with helping young children with their schoolwork. You do it to give your kids the finest possible start in life. But among all the advantages that this time spent together might provide, improving those grades is probably not one of them. Researchers from the US found no connection between parental assistance with homework and a child's performance in arithmetic or reading across two national datasets that included pupils in both public and private elementary schools. No matter how intelligent the adult or child, or how wealthy they are, the time spent slogging through algebra with them is unlikely to have a major impact on the academic performance of the learner. The authors state that their findings "call into doubt decades of support for parental involvement with and control over schoolwork." Academics have previously disagreed on the issue of how much homework assistance p...

A doctor may learn a lot about a child's health and development from the way they walk. The change from a wobbly toddler to a strutting adolescent, however, is not as common as you might imagine. A child's gait may develop slightly differently depending on where in the world they are raised. No matter where a child grows up, most studies indicate that by the age of 7, the length and timing of a child's footsteps correspond to the regularity and coordination of adult walking. However, other research has discovered modest variations in older children's gait from stride to stride. These variances can be impacted by culture and seem to last as long as a person's lanky lower limbs are still developing, up until early adolescence. For instance, researchers in South Africa have discovered that children in the first grade already walk with a mature angle of hip rotation. But in France, children don't begin to exhibit a comparably adult gait pattern until they are roughl...

In Michigan, one in five individuals are childless or have no immediate plans to have children. Adults without children have made the decision to forego parenthood altogether, regardless of their fertility. The study's author, sociologist Zarchary Neal of Michigan State University (MSU), stated in a tweet, "We estimate 21.64 percent of Michigan adults are #childfree." Together with research psychologist Jennifer Watling Neal, who works at MSU, he is the principal author of these recent discoveries. The researchers wanted to know how many American adults chose to live childfree, when they made this choice, and whether they maintained it over time. The authors state that the findings provide "important insights on childfree individuals, who constitute a demographically significant part of the population, but whose numbers have hitherto been significantly underestimated." This underestimate results from earlier research' exclusive attention on women or their re...

According to Reuters, the American-made bomb was found on July 25 by fishermen in the town of Borgo Virgilio in northern Italy, close to the city of Mantua. The bomb appears to have spent more than 70 years there underwater. However, as a result of several heat waves that slammed various areas of Europe (including Italy) with record high temperatures, the water levels in the River Po, which runs east-west across northern Italy, have dramatically decreased this summer. Military specialists estimate that the bomb weighed close to 1,000 pounds (450 kilograms). Military specialists broke the bomb's fuse and relocated the weapon to a quarry about 30 miles (45 kilometers) away after evacuating the roughly 3,000 residents who reside nearby. There, the bomb detonated safely, disabling it. The controlled explosion was said to have caused no injuries or damage. Extreme heat waves have affected a large portion of the Northern Hemisphere this summer, and as a result of ongoing climate change, ...

Key brain regions of the contemporary human take longer to mature than those of our long-extinct cousin, the Neanderthal, according to research on mice by scientists. In this case, slow and steady wins out, much like with the hare and the tortoise. The additional time is brought on by protein variations that also seem to lessen chromosomal mistakes, ultimately leading to a population that is healthier and more robust. The findings of the study suggest that this stage in human neocortex's development—the wrinkled outer layer responsible for higher order thinking—plays a role in defending us against sickness, a quality Neanderthals appear to lack. Recent developments in genetics have made it possible for researchers to sequence DNA taken from prehistoric bones, providing extensive knowledge about how the genome of the Neanderthal differs from our own. For instance, we are aware of around 100 amino acids, which are the building blocks of proteins, changing when modern humans split off...

It's simple to overlook the fact that these recognizable shrunken heads are actually the remains of real people who once lived and breathed since they have been reduced to the size of an apple and have had their eyes and lips sewed shut. The well-known artifacts (sometimes referred to as tsantsas) of the Shuar indigenous people of Ecuador have long been traded as curiosities, utilized as sets in theater and movies, and displayed to draw audiences. It is practically hard to distinguish which tsantsa are genuine artifacts of a vanished civilization and which were created to capitalize on our craving for the weird and exotic since the boundary between cultural artifact and whimsical trinket is so blurred. An experimental method for identifying which artifacts are most likely to be false has now been developed by researchers from Western University, Object Research Systems, and the University of San Francisco in Quito, Ecuador. Researchers were able to identify significant variations t...

One of the oldest known Stone Age societies in Northern Europe has been discovered using hand axes discovered in a riverbank in the county of Kent in southeast England. The stone tools were found in the 1920s and are now housed at The British Museum, but a recent research has used contemporary techniques to date them precisely for the first time, proving that early people lived in southern Britain between 560,000 and 620,000 years ago. In order to establish when the objects were buried, researchers employed infrared-radiofluorescence (IR-RF) dating, a method that pinpoints the time when certain mineral grains in rock and sand were last exposed to sunlight. "The variety of tools is incredible. The location yielded some of the earliest handaxes ever unearthed in Britain in the 1920s. Now that we have discovered extremely uncommon evidence of scraping and piercing tools at such a young age, "According to a news release from Alastair Key, an assistant professor of palaeolithic ar...

Consider the JFK assassination or the lengthy history of UFO sightings to see that conspiracy theories are hardly a new ailment. However, the internet is sometimes credited for ushering in a "post-truth" era, with social media in particular facilitating the spread of rumors that become viral. Whether or if something is genuinely true is a different issue, one that is important and warrants thought. Despite what many journalists, academics, and politicians claim, there isn't much concrete proof to date that conspiracy theories are becoming more and more common. A recent set of polls that were done in the United States and six European nations came to that result. Contrary to popular belief, the new study contends that conspiracy theories are a "more durable and universal element of human civilization." It's not all terrible news, either. The good news is that it doesn't appear that online news sources or social media are directly responsible. It seems con...