biology, Climate change, evolution, genetic modification, medicine, Science, science news, Space

Sunday Science 07/06/18

A haul of goodies in this week’s Sunday Science, including 3D printed corneas, golden rice, lightning on Jupiter, fossil fuel finances, and the world’s oldest footprints… Continue reading

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AI, biology, Climate change, Developmental biology, evolution, medicine, Science, science news, Sunday Science Stories

Sunday Science 27/05/18

Welcome to this week’s Sunday Science, featuring the driving forces behind human brain evolution, a gel to help the brain heal after stroke, organoids, carbon nanotubes, gluten sensitivity and an archive of the pick of 2017’s groundbreaking research articles… Continue reading

biology, cancer, evolution, medicine, Science, science news, Sunday Science Stories

Sunday Science 21/01/18

In this edition of Sunday science, wearable tech to monitor babies, giant bats, peregrine falcons, new blood tests for cancer, and working out how Alzheimer’s disease progresses.

The terminal attack trajectories of peregrine falcons are described by the same feedback law used by visually guided missiles. Or perhaps more accurately, since the birds were here first, the missiles use the same law. Open access, but there’s a less technical Science Daily version here.

Sussex University physicists have designed a new form of wearable tech which is small and unobtrusive, which would enable you to easily remotely monitor baby’s vital signs etc. They contain the most sensitive liquid-based devices, made from an affordable emulsion of graphene, water and oil.

A giant extinct bat that crawled on the ground has been described from fossils found in New Zealand.

Imaging brains with Alzheimer’s has shed light on the role of a key protein involved, tau, which seems to spread down highly connected neurons. Slowing down this process may help treat or stop the progression of the disease. Featured image: artist’s impression of the spread of tau filaments (red) throughout the brain, by Thomas Cope, via Cambridge university.

You may have seen in the mainstream news about a blood test that can be used to test for eight of the most common cancers. This works by detecting the presence of common cancer-causing mutations in certain genes. It’s exciting, but only really works effectively for very advanced cancers. You may not have seen another blood test that uses DNA methylation (reversible chemical modifications that alter how easy it is to turn a gene on or off) to detect and predict the spread of breast cancer:

And finally, in a first for me citing the journal Construction and Building Materials, how do make concrete that can heal its own cracks as they appear over time? Well, apparently, you might start by mixing fungi with it. A little experimental as yet, but a neat idea. This is paywalled, but you can read the Science Daily version here.

biology, evolution, psychology, Robotics, Science, science news

Sunday Science 17/12/17

This is the last Sunday Science of the year; I’ll start the series up again after the New Year, and bring some more longer posts too. This week, we have the genome of the extinct Tasmanian tiger, origami-inspired artificial muscles, and the psychological scars of the Industrial Revolution.

The genome of the extinct Tasmanian tiger, or thylacine, has been sequenced from a preserved specimen of a young pup. This animal died out over 80 years ago, and the genome gives hints of earlier population reduction before humans arrived, and possible reasons for why this marsupial bears such an uncanny resemblance to a dog or a wolf, despite being completely unrelated.

Engineers have designed artificial muscles inspired by origami folding.  (Pictured). Sounds a bit crazy, and looks a bit bizarre too, if you look at some of the videos in the original article, but they are flexible, light and very strong. There is a Science Daily summary here.

The industrial revolution left psychological scars. An analysis of 400,000 personality tests indicates that people living in the former industrial heartlands of England and Wales are more disposed to negative emotions. Researchers suggest this may be due to the social effects of severe work and living conditions, amongst other factors. These traits persist today given that most of these regions face high unemployment after the closure of mines and factories.

Researchers have long puzzled over why humans have such variable eye colour. It’s thought to be due to sexual selection, initially for novelty value. A hypothesis paper here points out that variable eye colour within the same species tends to occur only in humans and domesticated animals.

Lastly, one for the biochemists (and not open access, unfortunately). Rubisco, the enzyme which catalyses the first major step in the conversion of carbon dioxide to sugar molecules in plants, has been made in genetically engineered bacteria. To get a protein this large, with all its associated helper proteins, is a phenomenal achievement; it’s an incredibly complex and important enzyme, but not a very efficient one – it’s easy for oxygen instead of carbon dioxide to get into the binding site and cause a wasteful oxygenase side-reaction. Researchers have tried for years to make a better version. Now that it’s been genetically engineered into bacteria, this should be much easier to do.

Featured image

Derived from figure 1, Li, et al, “Fluid-driven origami-inspired artificial muscles.” doi: 10.1073/pnas.1713450114

 

 

 

 

 

biology, evolution, Explainer, Miscellaneous, Science, science news, Sunday Science Stories

Sunday Science 03/12/17

Welcome to this week’s Sunday Science, with pterosaur eggs, scallop eyes, sponges (of the animal kind), and some very tough women.

A huge cache of fossil pterosaur eggs has been discovered in China, giving remarkable clues as to their development and lifestyle (pictured).

A long-standing argument over the whether sponges or comb jellies are the sister group of animals may have been resolved, and it looks like the sponges are it. It does sound rather obscure, but it’s an important step forward for understanding animal evolution. That link is the original article: this did make the mainstream news (link for the non-specialist).

The largest tree-planting scheme in England for 30 years has been given the green light. Over 600,000 trees will be planted in Northumberland over the next two years. Good news for our heavily deforested country, and hopefully providing habitat for the red squirrel.

Prehistoric women were strong and tough. As in, really strong and tough, with better arm strength than elite rowers, a new study has found. This isn’t just a novel finding – it’s important to understanding the heavily overlooked history of female manual labour. (A news story based on this study may be found at Daily Science News here.)

And finally, scallop eyes work like teeny tiny telescopes:

 

Featured image via Nature.com, by Zhao Chuang.

biology, evolution, medicine, News, Science, Sunday Science Stories

Sunday Science 19/11/17

This week: Giant otters, axolotls and new pain killers.

An otter the size of a wolf that lived 6 million years ago may have been a dominant predator. A new analysis indicates that it had a much more powerful bite than anticipated.

Axolotls, the Mexican salamander (pictured), are a favoured model organism because of their astonishing ability to regenerate their limbs. They are also popular pets. Unfortunately, they are heading towards extinction in the wild.

Not exactly news, but certainly topical: Nature videos has produced an excellent animation detailing how CRISPR/Cas9 gene editing works, and the potential useful modifications, including some newer ones I detailed in a recent post on gene editing. 

 

 

The opioid epidemic in the US is causing several thousand deaths a year. These drugs give powerful pain relief, but have the side-effect of suppressing breathing: fatal overdoses usually kill because the person stops breathing. So many research groups are designing drugs that preferentially cause the pain relief without the respiratory depression, and a new paper in Cell this week (link to perspective article) identifies some possibilities that could be even more effective than those currently in clinical trials. This is behind the paywall, unfortunately, but there’s a news piece here.