The COSMOS-Web field, a vast map of the universe, has been released to the public, and it’s a game-changer. The largest-ever map of the cosmos, built with data collected by the James Webb Space Telescope (JWST), consists of imaging and a catalog of nearly 800,000 galaxies spanning nearly all of cosmic time.

The goal of the COSMOS-Web collaboration was to create this deep field of space on a physical scale that far exceeded anything that had been done before. “If you had a printout of the Hubble Ultra Deep Field on a standard piece of paper,” said UC Santa Barbara physics professor Caitlin Casey, “our image would be slightly larger than a 13-foot by 13-foot-wide mural, at the same depth.” That’s what we’re looking at here – a cosmic neighborhood that’s truly breathtaking.

The COSMOS-Web composite image reaches back about 13.5 billion years, covering about 98% of all cosmic time. The researchers wanted to see not just some of the most interesting galaxies at the beginning of time but also to get a wider view of cosmic environments that existed during the early universe, when the first stars, galaxies, and black holes formed.

And what a big surprise it turned out to be! Before JWST turned on, Casey said they made their best predictions about how many more galaxies the space telescope would see. But the best measurements from Hubble suggested that galaxies within the first 500 million years would be incredibly rare. “It makes sense,” she explained – “the Big Bang happens and things take time to gravitationally collapse and form, and for stars to turn on.”

But with JWST, they see roughly 10 times more galaxies than expected at these incredible distances. And it’s not just seeing more; they’re also seeing different types of galaxies and black holes that were previously invisible.

While the COSMOS-Web images and catalog answer many questions astronomers have had about the early universe, they also spark more questions. “Since the telescope turned on we’ve been wondering ‘Are these JWST datasets breaking the cosmological model?'” Casey said. “Because the universe was producing too much light too early; it had only about 400 million years to form something like a billion solar masses of stars.”

In releasing the data to the public, the hope is that other astronomers from all over the world will use it to further refine our understanding of how the early universe was populated and how everything evolved to the present day. The dataset may also provide clues to other outstanding mysteries of the cosmos, such as dark matter and physics of the early universe that may be different from what we know today.

“A big part of this project is the democratization of science and making tools and data from the best telescopes accessible to the broader community,” Casey said. The data was made public almost immediately after it was gathered, but only in its raw form, useful only to those with specialized technical knowledge and supercomputer access to process and interpret it.

The COSMOS collaboration has worked tirelessly for the past two years to convert raw data into broadly usable images and catalogs. In creating these products and releasing them, the researchers hope that even undergraduate astronomers could dig into the material and learn something new.

“Because the best science is really done when everyone thinks about the same data set differently,” Casey said. “It’s not just for one group of people to figure out the mysteries.”

For the COSMOS collaboration, the exploration continues. They’ve headed back to the deep field to further map and study it. “We have more data collection coming up,” she said. “We think we have identified the earliest galaxies in the image, but we need to verify that.”

The science of tickling has been shrouded in mystery for over 2000 years, leaving even the great philosophers Socrates and Charles Darwin baffled. Despite its ubiquity in human interaction, from playful teasing between parents and children to social bonding and emotional expression, the intricacies of tickling remain poorly understood. Neuroscientist Konstantina Kilteni argues that it’s time to take tickle research seriously, shedding light on the complex interplay of motor, social, neurological, developmental, and evolutionary aspects involved.

One of the most intriguing questions surrounding tickling is why we can’t tickle ourselves. Our brain appears to distinguish between self-induced and external stimuli, effectively “switching off” the tickling reflex when we know exactly where and when we’ll be tickled. This phenomenon has sparked interest in understanding what happens in our brain when we’re subjected to ticklish sensations.

Research suggests that people with autism spectrum disorder (ASD) perceive touches as more ticklish than those without ASD, offering a unique window into differences in brain development and function between individuals with and without the condition. Investigating this difference could provide valuable insights into the neurobiology of ASD and potentially inform strategies for better understanding and supporting individuals on the autism spectrum.

From an evolutionary perspective, the purpose and significance of tickling remain unclear. Kilteni notes that even apes like bonobos and gorillas exhibit responses to ticklish touches, while rats have been observed displaying similar behaviors. These observations raise questions about the role of tickling in human evolution and development, as well as its potential functions in social bonding and emotional expression.

To tackle these questions, Kilteni has established a specialized lab dedicated to studying tickling, where researchers can control and replicate various types of ticklish stimuli using mechanical devices like the “tickling chair.” By meticulously recording brain activity and physical reactions such as heart rate, sweating, breathing, laughter, and screaming responses, scientists hope to unlock the secrets of tickling and shed light on its significance in human biology and behavior.

As research continues to unravel the mysteries of tickling, it’s clear that this seemingly simple phenomenon holds a wealth of complexity and intrigue. By taking tickle research seriously, scientists like Kilteni aim to reveal new insights into human brain development, social bonding, emotional expression, and even the intricacies of ASD. The journey ahead promises to be fascinating, as we continue to explore the elusive science of tickling.

A recent study conducted at the University of Gothenburg has shed new light on the risk factors for severe birth injuries, specifically obstetric anal sphincter injuries (OASI). The research aimed to develop and validate a prediction model that assesses the risk of OASI before vaginal delivery. This breakthrough could lead to improved care and reduced injuries during childbirth.

In Sweden, five percent of women giving birth to their first child experience OASI, which can have long-term consequences on physical health and quality of life. The study examined registry data from all 45 maternity units in Sweden for the period 2009-2017, involving over 600,000 singleton, head-first births.

The research revealed that larger babies are the strongest predictor of OASI, with a significant increase in risk for those giving birth vaginally for the first time. Previous OASI was also found to be a strong indicator of repeat injury among women having their second vaginal delivery. Furthermore, the use of a vacuum cup during assisted birth was identified as another risk factor.

The prediction models developed by the researchers demonstrated high accuracy and reliability, comparable to established tools used in other fields such as cardiovascular disease and breast cancer. The study’s lead author, Jennie Larsudd-Kåverud, emphasized that these models enable healthcare professionals and pregnant women to assess the risk of severe birth injury together, facilitating joint planning and prevention.

With this new method, medical staff can identify individuals at higher risk of OASI and take necessary precautions to minimize the chances of severe birth injuries. This innovative approach has the potential to improve care during childbirth and reduce long-term health consequences for mothers and their babies.