Ancient Babylonians Figured Out Forerunner of Calculus ( 153

sciencehabit writes: Tracking and recording the motion of the sun, the moon, and the planets as they paraded across the desert sky, ancient Babylonian astronomers used simple arithmetic to predict the positions of celestial bodies. Now, new evidence reveals that these astronomers, working several centuries B.C.E., also employed sophisticated geometric methods that foreshadow the development of calculus. Historians had thought such techniques did not emerge until more than 1400 years later, in 14th century Europe.

SpaceX Successfully Tests Crew Dragon Landing Parachutes 91

SpaceX successfully tested out the parachute system it plans to use to land its Crew Dragon spaceship safely back on Earth today. By using a "mass simulator," SpaceX was able to replicate the weight and shape of the spacecraft. According to NASA, "Later tests will grow progressively more realistic to simulate as much of the actual conditions and processes the system will see during an operational mission."

The goal of the test was to evaluate the four main parachutes, but this test did not include the "drogue chutes" the full landing system will utilize. The aim is for the spacecraft to splash safely into the ocean carried down by parachutes to reduce its speed. Eventually, SpaceX intends for the spacecraft to land upright on solid ground by utilizing eight SuperDraco propulsion engines. SpaceX successfully landed its Falcon 9 rocket at Cape Canaveral in December. Earlier this month, a SpaceX Falcon 9 exploded upon landing on a drone ship.

Researchers Use CRISPR To Repair Genetic Defect That Causes Blindness ( 41

hypnosec writes: In what has been claimed to be the first use of gene editing technique CRISPR for replacement of a defective gene associated with a sensory disease, researchers have repaired a genetic defect that causes blindness. The research that led to successful editing of defective genes responsible for retinitis pigmentosa (RP) – an inherited condition that causes the retina to degrade and leads to blindness in at least 1.5 million cases worldwide – was carried out using stem cells derived from a patient's tissue. Published in Scientific Reports, the study paves the way for using CRIPSR therapeutically to treat eye diseases.

The Future of Astronomy: NASA's James Webb Space Telescope 117

An anonymous reader writes: In 1990, the Hubble Space Telescope was launched and deployed, becoming the first space-based observatory. In the years since, many others have followed, covering the entire electromagnetic spectrum, but with nothing superseding Hubble over the wavelengths it covers. That will all change with the James Webb Space Telescope, currently on schedule and almost ready for its October 2018 launch date. The science instruments are all complete, the final mirrors are being inserted into the optical assembly, the sunshield (a new, innovative component) is almost complete, and then it just needs assembly and launch. When it's all said and done, JWST will be orders of magnitude greater than all the other observatories that came before, and will finally allow us to truly see the first stars, galaxies and quasars in the Universe, not limited by the obscuring neutral gas that currently blocks our view with other observatories.

30 Years Since The Challenger Disaster: Where Were You? ( 320

Martin S. writes: Thirty years ago today, NASA suffered a spaceflight tragedy that stunned the world and changed the agency forever. When I mentioned this at work most of my colleagues are too young to remember this first hand. When I heard the news, I was in a middle-school science class; our teacher walked us solemnly over to the school library, where we watched the television news. It hit especially hard because one of our other teachers had pursued the slot that was eventually filled by Christa McAuliffe.

Why the Calorie Is Broken ( 108

New submitter writes: Cynthia Graber and Nicola Twilley explain how we are still using a century old method for measuring the calories in our food and the calories spent in different human activities. Essentially, there is a very big difference between burning stuff in a bomb calorie-meter and the extremely complex ways our body extracts energy from food. In fact, the exact process of digestion is yet to be understood sufficiently at a micro level, and years from being replicated to any close degree. Plus, the way our bodies spend calories for a given activity is hugely different from the way a car consumer gasoline and dependent on a number of parameters — some of which are not even known currently. Therefore, balancing calories in to Calories out is not so stupidly simple as it seems to the underweight layperson . Update: 01/28 22:09 GMT by T : Sorry for the duplicate post; it was a long night.
The Almighty Buck

A Crowdfunding Site To Help Pay Patients' Medical Bills 285

Lucas123 writes: A start-up financial services company called Someone With Group has just completed a pilot of a crowdfunding service that allows hospitals to set up campaigns to help patients pay their medical expenses. The website, which is HIPAA compliant in terms of privacy and security, allows patients facing medical debts to inform family, friends and even strangers of their need for funds versus flowers or cards. The crowdfunding service also addresses a systemic debt issue in the healthcare industry. Each year, the U.S. healthcare industry writes off $40 billion in bad debt from unpaid medical bills. "Then you consider that $6 billion is spent on cards and flowers for patients every year. Why can't we redirect that money and put it into a debit instrument restricted to medical spending only?" said Jagemann-Bane, CEO of Someone With Group. One hospital group, Pinnacle Health Systems in Harrisburg, Penn., routinely writes off $40 million to $50 million a year in unpaid medical bills from patients. The hospital set up a crowdfunding site via Someone With Group and so far has seen a couple dozen patients use it. ... After a one-year pilot of the crowdfunding service, patients who've used it on average have raised $2,315.

Consciousness May Be the Product of Carefully Balanced Chaos ( 121

sciencehabit writes: The question of whether the human consciousness is subjective or objective is largely philosophical. But the line between consciousness and unconsciousness is a bit easier to measure. In a new study (abstract) of how anesthetic drugs affect the brain, researchers suggest that our experience of reality is the product of a delicate balance of connectivity between neurons—too much or too little and consciousness slips away. During wakeful consciousness, participants’ brains generated “a flurry of ever-changing activity”, and the fMRI showed a multitude of overlapping networks activating as the brain integrated its surroundings and generated a moment to moment “flow of consciousness.” After the propofol kicked in, brain networks had reduced connectivity and much less variability over time. The brain seemed to be stuck in a rut—using the same pathways over and over again.

Why the Calorie Is Broken ( 425

An anonymous reader writes: Nutrition is a subject for which everybody should understand the basics. Unfortunately, this is hard. Not only is there a ton of conflicting research about how to properly fuel your body, there's a multi-billion-dollar industry with financial incentive to muddy the waters. Further, one of the most basic concepts for how we evaluate food — the calorie — is incredibly imprecise. "Wilbur Atwater, a Department of Agriculture scientist, began by measuring the calories contained in more than 4,000 foods. Then he fed those foods to volunteers and collected their faeces, which he incinerated in a bomb calorimeter. After subtracting the energy measured in the faeces from that in the food, he arrived at the Atwater values, numbers that represent the available energy in each gram of protein, carbohydrate and fat. These century-old figures remain the basis for today's standards."

In addition to the measuring system being outdated, the amount of calories taken from a meal can vary from person to person. Differences in metabolism and digestive efficiency add sizable error bars. Then there are issues with serving sizes and preparation methods. Research is now underway to find a better measure of food intake than the calorie. One possibility for the future is mapping your internal chemistry and having it analyzed with a massive database to see what foods work best for you. Another may involve tweaking your gut microbiome to change how you extract energy from certain foods.


Flat-Earth Argument Results in Rap Battle ( 235

New submitter mjjochen writes: A little something to make you smile (or cry). NPR reports on astrophysicist Neil deGrasse Tyson calling out rapper B.o.B. in a Twitter (& rap) argument over the status of the earth (are we round or flat?). Rapper B.o.B. references the usual conspiracy theories to support his case in his throwdown (music). Neil deGrasse Tyson responds (actually, his nephew does), on why B.o.B.'s points are not very well-informed (music). As Tyson puts it, "Duude — to be clear: Being five centuries regressed in your reasoning doesn't mean we all can't still like your music." Shall we start leeching the four humors from the body again to achieve balance? Hrm.
Data Storage

Six Missing HDDs Contain Health Information of Nearly a Million Patients ( 87

Lucas123 writes: Health insurer Centene Corp. revealed that it is looking for six HDDs with information on 950,000 customers that went missing during a data project that was using laboratory results to improve the health outcomes of patients. The drives not only contain sensitive personal identification information, such as addresses, dates of birth and social security numbers, but they also contain health information. "While we don't believe this information has been used inappropriately," said Michael Neidorff, CEO of Centene.

New Clues To How the Brain Maps Time ( 79

An anonymous reader sends this excerpt from Quanta Magazine: Our brains have an extraordinary ability to monitor time. A driver can judge just how much time is left to run a yellow light; a dancer can keep a beat down to the millisecond. But exactly how the brain tracks time is still a mystery. Researchers have defined the brain areas involved in movement, memory, color vision and other functions, but not the ones that monitor time. Indeed, our neural timekeeper has proved so elusive that most scientists assume this mechanism is distributed throughout the brain, with different regions using different monitors to keep track of time according to their needs.

Over the last few years, a handful of researchers have compiled growing evidence that the same cells that monitor an individual's location in space also mark the passage of time. This suggests that two brain regions — the hippocampus and the entorhinal cortex, both famous for their role in memory and navigation — can also act as a sort of timer.


Ask Slashdot: Math-Related Present For a Bright 10-Year-Old? 238

peetm writes: I have an above averagely bright nephew, aged 10, who's into maths and whose birthday is coming up soon. I'd like to get him a suitable present – most likely one that's mathematically centred. At Christmas we sat together while I helped him build a few very simple Python programs that 'animated' some simple but interesting maths, e.g., we built a factorial function, investigated the Collatz conjecture (3n + 1 problem) and talked about, but didn't implement Eratosthenes' Sieve – one step too far for him at the moment perhaps. I've looked about for books that might blend computing + maths, but haven't really found anything appropriate for a 10-year-old. I should be indebted to anyone who might suggest either a suitable maths book, or one that brings in some facet of computing. Or, if not a book, then some other present that might pique his interest.

How Melinda Gates Got Her Daughters Excited About Science ( 106

theodp writes: GeekWire reports that Melinda Gates concluded a Davos panel discussion about gender parity with a personal story about her own family, explaining how she originally became interested in computer science, and how she later played Lab Manager to Bill's Mr. Wizard to help pass along their passion for science and math to their kids. "On Saturday mornings," Gates explained, "I wanted to sleep late. So you know what I did? I made sure there were science projects available, and that's what he did with our two daughters and our son. And guess what my two daughters are interested in? Science and math."

US Regulators Find Serious Deficiencies At Theranos Lab ( 66

An anonymous reader writes: 2016 has not started well for blood-testing startup Theranos. Already facing allegations of data manipulation, the Centers for Medicare and Medicaid Services have found problems with Theranos' laboratory in Newark, California, putting the company's relationship with the Medicare program in danger. WSJ reports: "It isn't clear exactly what regulators have faulted Theranos for in their latest inspection, which took several months. Adverse findings would be another regulatory setback for one of Silicon Valley's highest-profile startups, valued at about $9 billion in 2014. Theranos already has stopped collecting tiny samples of blood from patients' fingers for all but one of its tests while it waits for the Food and Drug Administration to review the company's applications for wider use of the proprietary vials called 'nanotainers.' In October, the FDA said it had determined that the nanotainers were an 'uncleared medical device.'"

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