Science

The so-called "gut-brain axis" is the well-established bidirectional interaction between the gut microbiome and the brain. In other words, the microbiome in our gut has been found to influence many aspects of our brain: stress physiology and psychology, mood, cognition, and behavior.

A novel challenge has arisen from this finding. Namely, how can astronauts stay alert and healthy through their travels? 

CNN reports that scientists have created a mouse embryo that's 4% human. The hybrid is what scientists call a human-animal chimera, a single organism that is made up of two different sets of cells. This human-mouse chimera has by far the highest number of human cells ever recorded in an animal.

According to BigThink, a publication focused on education, what consciousness is and where it comes from has absorbed great minds for thousands of years. In today's world, it's a question posed by physicists, cognitive scientists, and neuroscientists. There are a few prevailing theories.

The first is known as materialism. This is the idea that consciousness emanates from matter. In the case of people, by the firing of neurons inside the brain. If you take the brain out of the equation, then consciousness doesn't exist at all.

Global News, a Canadian news outlet, reported that astronomers detected an explosion over fifteen times the size of our galaxy. This makes it the biggest blast ever recorded.

According to CNN, in late 2019, a small piece of birch pitch (pictured above) was found by archeologists on Lolland, the fourth largest island of Denmark. A study uncovered a 5,700-year-old girl's entire genome and oral microbiome, marking the first time human genetic material has successfully been extracted from something besides human bones.

The BBC reports that a new way of editing DNA could correct 89% of the errors in DNA that cause disease. The technology, called prime editing, has been used to correct damaging DNA mutations in the lab, including those that cause sickle cell anaemia. It is the latest advance in gene editing, which is developing at a rapid pace.

The 2019 Nobel Prize in chemistry has been awarded to three scientists who played a large role in developing lithium-ion batteries: Stanley Whittingham of the U.K., American John Goodenough (at 97, the oldest Nobel laureate ever), and Japan’s Akira Yoshino. Whittingham created the first functional lithium-ion battery in the 1970s, then Goodenough increased its capacity two-fold over the next 10 years. Finally, Yoshino removed the pure lithium, making it much safer to use.

Mathematicians, computer engineers and scientists in related fields should take a Hippocratic oath to protect the public from powerful new technologies under development, says Hannah Fry, an associate professor of mathematics at University College, London. The ethical pledge would commit scientists to think deeply about the possible applications of their work and compel them to pursue only those that, at the least, do no harm to society.

Recently, the ancient art of origami has begun to merge with modern engineering. Origami principles have inspired novel ways of packaging airbags, fashioning heart stents, folding solar sails designed to propel spacecraft, and even collapsible bullet-proof shields. 

“Ultra-lightweight space blankets have been around for decades, but the key drawback is that the material is static," said Alon Gorodetsky, UCI associate professor of chemical & biomolecular engineering. "We've made a version with changeable properties so you can regulate how much heat is trapped or released."

The researchers took design cues from various species of squids, octopuses and cuttlefish that use their adaptive skin to thrive in aquatic environments.

Sex is supposed to be simple, at least at the molecular level. X + X = female and X + Y = male.

But as science looks more closely, it becomes increasingly clear that a pair of chromosomes is not always sufficient to distinguish girl/boy—either from the standpoint of sex (biological traits) or of gender (social identity).

In the cultural realm, this shift in perspective has received a wide embrace, with “nonbinary” definitions of gender—transfeminine, genderqueer—having already entered the vernacular. Less visible are the changes taking place in the biological sciences.

A small cylinder called Le Grand K has defined the kilogram for more than a hundred years.

Le Grand K was forged in 1879 and is held in a locked vault outside Paris—revered and kept under lock and key because its mass, a little over 2 pounds, is the official definition of the kilogram.

If Le Grand K gets heavier or lighter—or absorbs atoms of something from the air—the definition of the kilogram literally changes.

A European-Japanese spacecraft set off on a treacherous seven-year journey to Mercury to probe the solar system's smallest and least-explored planet.

The BepiColombo mission, only the third ever to visit Mercury, blasted off from Europe’s spaceport in French Guiana aboard an Ariane 5 rocket at 10:45 p.m. local time on Friday, October 19 (0145 GMT on Saturday), according to the Japan Aerospace Exploration Agency (JAXA).

Japan landed two unmanned rovers on a 1-kilometer-wide asteroid named Ryugu in late September, 2018. It was the first time robot rovers have successfully landed on an asteroid surface.

"I felt awed by what we had achieved in Japan. This is just a real charm of deep space exploration," Takashi Kubota, a spokesman for the space agency, told CNN. The two rovers together are called MINERVA-II1 and came from the spacecraft Hayabusa2.

Two scientists who discovered how to harness the body’s immune system to fight cancer won the 2018 Nobel prize in physiology or medicine. James Allison, of the US, and Tasuku Honjo, of Japan, shared the 9m Swedish kronor ($1m/¥113m) prize.

The scientists’ groundbreaking work on the immune system has paved the way for a new class of cancer drugs that are already dramatically changing outcomes for patients. It is the first time the development of a cancer therapy has been recognised with a Nobel prize.

Scientists have recently discovered two exoplanets, Kepler-62f and Kepler 186f, which are located within the habitable zones of their respective stars, and the best part is that the planets probably have stable climates and regular seasons. The astronomers also believe that one of them is similar in size to our home planet. 

In the summer of 2019, French swimmer and anti-plastic campaigner Ben Lecomte swam through the giant floating rubbish mass known as the Great Pacific Garbage Patch. 

The exact size of the Great Pacific Garbage Patch is impossible to determine, but estimates put it anywhere from 700,000 to 15,000,000 km² (or the size of Texas to the size of Russia). The patch is caused by the North Pacific gyre—a circle of currents that keep plastic, waste and other pollution trapped. According to scientists, the Patch has been growing “exponentially” in recent years.

Every day, we use products that are built using “rare earths”—a group of 17 elements that are, as the name suggests, very rare. They’re used to make everyday items such as rechargeable batteries, LED lights and display panels, as well as larger products such as wind turbines.

Now, it turns out, Japan has an estimated 16 million tons of the stuff on its turf. Researchers claim the trove might be enough to supply the world with metals such as yttrium and europium on a “semi-infinite basis.”

When I mentioned to a friend that my baseline neurosis had evolved from daily stress into anxiety, her response was, "Go for a float!"

A float?

Yes — spend an hour in a dark, soundproof room floating in a salted, body-temperature warm pool. "You just lie there and meditate," my friend told me.