How Eratosthenes Estimated the Circumference of the Earth Over 2,000 Years Ago

Posted on August 25, 2016  Comments (2)

In this video Carl Sagan explains how Greek astronomer Eratosthenes, in 200 BC, was able to deduce and calculate the earth was a sphere about 40,000 km in circumference.

It is wonderful to see how a bit of thought and curiosity have lead mankind to learn so much.

Related: How do Plants Grow Into the Sunlight?Why is it Colder at Higher Elevations?Great Webcast Explaining the Digestive SystemBiology: How Wounds to Our Skin Heal

Promoting Open Science

Posted on July 30, 2016  Comments (1)

As I have written many times in the past we need to take back science from the closed-science journals. Historically journals were useful (before the internet). With the advent of the internet (and its spread) instead of maintaining the mission they started with the journals sought to maximize their profit and their own pay and jobs at the expense of sharing scientific knowledge with the world.

Elsevier — my part in its downfall by Timothy Gowers provides another good look at what can be done to promote science, math and engineering by addressing the damage to that goal being done by closed science publishers.

Recently he announced the launch of Discrete Analysis, a new journal that publishes to arXiv.

Disrupting the subscription journals’ business model for the necessary large-scale transformation to open access from the Max Planck Digital Library provides some good ideas for how to promote science in spite of the closed science journals fighting that goal.

There needs to be a shared understanding that the money currently locked in the journal subscription system must be withdrawn and re-purposed for open access publishing services. The current library acquisition budgets are the ultimate reservoir for enabling the transformation without financial or other risks.

Related: The Architecture of Access to Scientific KnowledgeWhy Copyright Extension is a Very Bad IdeaPublishers Continue to Fight Open Access to Science (2007)Harvard Steps Up Defense Against Abusive Journal Publishers (2012)

Super Awesome Micro Project – Full Size Lego Car

Posted on July 24, 2016  Comments (4)

Here is an interview with Steve Sammartino (Australia) and Raul Oaida (Romania) on their efforts to build the car. The project built a fullsize car out of lego ($60,000 worth of legos) with a lego engine that works on air. It really is an interesting interview.

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US Fish and Wildlife Service Plans to Use Drones to Drop Vaccine Treats to Save Ferrets

Posted on July 16, 2016  Comments (0)

Despite significant recovery successes, the black-footed ferret remains one of the most endangered animals in the world.

Black-footed ferret

Black-footed ferret, photo by J. Michael Lockhart, USFWS.

The U.S. Fish and Wildlife Service has developed a plan to use (UAS) to deliver prairie dog sylvatic plague vaccination.

The primary purpose in this proposal is to develop the equipment, protocols and experience in use of UAS (drones) to deliver oral sylvatic plague vaccine (SPV). It is anticipated that this approach, when fully developed, will offer the most efficient, effective, cost-conscious and environmentally friendly method to apply SPV annually over large areas of prairie dog colonies in support of black-footed ferret recovery.

Plague is a primary obstacle to black-footed ferret recovery. After more than 20 years of intensive reintroduction efforts across 27 reintroduction sites ranging from Mexico to Canada, approximately 300 ferrets were known to exist in the wild at the end of 2015. Ferrets are constantly threatened by plague outbreaks that affect both ferrets, and their primary prey and habitat provider, prairie dogs.

To date, SPV has been applied by hand with people walking pre-defined transects and uniformly dropping single SPV baits every 9-10 meters to achieve a deposition rate of 50 SPV doses per acre. Depending on vegetation and terrain, a single person walking can treat 3-6 acres per hour. All terrain vehicles (ATVs) have been considered but have various problems.

The bait treats are M&Ms smeared in vaccine-laden peanut butter.

Preliminary discussions with people experienced with UAS suggest an aerial vehicle travelling at a modest 9 meters per second could drop a single SPV bait once per second that would result in treating one acre every 50 seconds. If the equipment and expertise can be developed as proposed here, a single UAS operator could treat more than 60 acres per hour.

If the equipment can be developed to deposit 3 SPV doses simultaneously every second, as they envision is possible, some 200 acres per hour could be treated by a single operator. The idea is that the drone would fire the treats in 3 different directions to increase the spread of treats.

The areas to be treated are located in South Phillips County, Montana.

Related: Using Drones to Deliver Medical Supplies in Roadless Areas (2014)The sub-$1,000 unpiloted aerial vehicles UAV Project (2007)Autonomous Flying Vehicles (2006)Cat Allergy Vaccine Created (2011)AlienFly RC Mosquito Helicopter (2007)

Autonomous Delivery Robots Launched in Europe and USA

Posted on July 9, 2016  Comments (1)

Starship Technologies is launching a fleet of autonomous delivery robots on the pavements of the United Kingdom, Germany and Switzerland as part of the testing program. A similar program will be announced for the United States shortly.

The largest European food delivery company Just Eat, leading German parcel delivery company Hermes, leading German retailer Metro Group, and innovative London food delivery startup Pronto will test the delivery robots developed by Starship Technologies, a company launched in 2014 by Skype co-founders.

a starship robot at Branderburg Gate, Berlin

Starship delivery robot, Branderburg Gate, Berlin, Germany

As part of the program, dozens of robots will be deployed in five cities to run first test deliveries and introduce the innovative devices to the general public.

“By launching partnerships with major companies we will enter the next phase in our development. While Starship has been testing the robots in 12 countries in the last nine months, we will now develop know-how on running real robotic delivery services,” said Ahti Heinla, co-founder, CEO and CTO of Starship Technologies.

Robots developed by Starship Technologies are meant for delivering packages, groceries and food to consumers in a 2-3 mile radius. The robots can drive autonomously while being monitored by human operators in control centers. Introduced to European and American cities since the end of last year, the robots have already driven close to 5,000 miles and met over 400,000 people without a single accident.

Frank Rausch, CEO of Hermes Germany, said: “We are very proud to be Starship’s exclusive logistics partner in Germany. At Hermes we believe that parcel delivery’s main goal is to fully satisfy the customers’ needs in receiving their online shopping orders as fast and convenient as possible. Nobody likes to spend hours waiting for the courier just to have a parcel delivered. Therefore, individually scheduled delivery services will become increasingly important within the coming years.”

The test programs will run in London, Düsseldorf, Bern and another German city to start, before moving to several other European and American cities. Starship Technologies will also continue testing in Tallinn, Estonia where its R&D facilities are located.

Related: Using Drones to Deliver Medical Supplies in Roadless Areas (2014)Self Driving Cars Have Huge Potential for Benefit to Society (2014)Autonomous Helicopters Teach Themselves to Fly (2008)Toyota Develops Thought-controlled Wheelchair (2009)

Dinosaur Bird Wing and Feather in Amber

Posted on July 3, 2016  Comments (0)

Rare Dinosaur-Era Bird Wings Found Trapped in Amber

Two tiny wings entombed in amber reveal that plumage (the layering, patterning, coloring, and arrangement of feathers) seen in birds today already existed in at least some of their predecessors nearly a hundred million years ago.

Skin, muscle, claws, and feather shafts are visible, along with the remains of rows of feathers similar in arrangement and microstructure to modern birds.

photo of dinosaur wing in amber with feathers visible

The nearly 100 million year old wing shows a structure that is very similar to modern birds.

The piece in this photo, and others samples, were bought at an amber market in Myitkyina, the capital of Kachin state in northern Myanmar. The region is politically unstable and most of the amber is sold to Chinese consumers for jewelry and decorative carvings.

Read the related posts for more on the wonderful discoveries saved in amber of hundreds of millions of years. We get to read about these amazing discoveries so often it is easy to lose appreciation for how amazing each one is. This photo shows a wind that was used by a dinosaur almost 100 million years ago.

Related: Marine Plankton From 100 Million Years Ago Found in Amber 2008)Learning About Life over 200 Million Years Ago From Samples Trapped In Amber (2012)The evolution of birds from small predatory dinosaursDino-Era Feathers Found Encased in Amber (2008)Amber Pieces Containing Remains from Dinosaurs and Birds Show Feather Evolution (2011)Ancient Whale Uncovered in Egyptian Desert

Backyard Wildlife: Great Tailed Grackle

Posted on June 28, 2016  Comments (3)

Great tailed grackle, stalking in grass

I think this is a Great Tailed Grackle, please comment if you think I am wrong. This is taken in my backyard in Arlington, Virginia.

Great tailed grackle, sitting in grass

Related: Red-Shouldered HawkBackyard Wildlife: Fox and DeerBackyard Wildlife: Blue JayBackyard Wildlife – ChimpmunkBackyard Wildlife: Robins Attack Holly Tree

Concrete Tent

Posted on June 18, 2016  Comments (0)

This shows a cool engineering innovation: canvas-like material that when it is saturated with water will set (over 5+ hours) into hard concrete. In this example a “tent” with regular doors is covered with water and inflated. After setting it hard enough to climb on top of.

The manufacturer’s site has move information.

Related: Concrete pre-fad Houses 1919 and 2007Easy to Assembly Off-the-grid TownsResearch on Ancient Roman Concrete Will Allow the Creation of More Durable and Environmentally Friendly ConcreteUW- Madison Wins 4th Concrete Canoe Competition

An Eukaryote that Completely Lacks Mitochondria

Posted on June 11, 2016  Comments (0)

If you don’t have any idea what the title means that is ok. I probably wouldn’t have until the last 15 years when I found how interesting biology is thanks to the internet and wonderful resources online making biology interesting. I hope you find learning about biology as interesting as I do.

Look, Ma! No Mitochondria

Mitochondria have their own DNA, and scientists believe they were once free-living bacteria that got engulfed by primitive, ancient cells that were evolving to become the complex life forms we know and love today.

What they learned is that instead of relying on mitochondria to assemble iron-sulfur clusters, these cells use a different kind of machinery. And it looks like they acquired it from bacteria.

The researchers say this is the first example of any eukaryote that completely lacks mitochondria.

However, the results do not negate the idea that the acquisition of a mitochondrion was an important and perhaps defining event in the evolution of eukaryotic cells, he adds.

That’s because it seems clear that this organism’s ancestors had mitochondria that were then lost after the cells acquired their non-mitochondrial system for making iron-sulfur clusters.

Biology is amazing and mitochondria are one of the many amazing details. I wish so much that my education could have given biology a tiny fraction of the interest I have found it in after school.

Related: Human Gene Origins: 37% Bacterial, 35% Animal, 28% EukaryoticOne Species’ Genome Discovered Inside Another’sParasite Evolved from Cnidarians (Jellyfish etc.)Plants, Unikonts, Excavates and SARs

Mountain Lion Roams from South Dakota all the way to 30 Miles from Manhattan

Posted on June 4, 2016  Comments (1)

book cover with image of a mountain lion

A Cougar’s Thousand-Mile Quest to Find a Mate

In the late summer of 2009, a young male cougar set off from the Black Hills of South Dakota to look for a mate. And kept going—east across the Great Plains to the Upper Peninsula of Michigan and on to New England, through backyards and parking lots, across highways and railroad tracks, driven by the most powerful force on earth.

Over time he showed up in the Twin Cities of Minnesota and in Wisconsin. He disappeared for a couple months, then shows up almost two years later, 30 miles from Manhattan, in Greenwich, Connecticut. In all he probably traveled 2,000 to 5,000 miles, enough to cross the country twice. He forded all the major rivers of the East, navigated highways and an international boundary. It was one of the most spectacular journeys by an animal ever recorded.

image of map showing the cougar's path across usa

In Heart of a Lion: A Lone Cat’s Walk Across America William Stolzenburg provides an exciting tale of the cat’s journey.

Related: Backyard Wildlife: Mountain Lion (2012)Mountain Lions Returning to the Midwest USA for the First Time in a Century (2012)Big Cats in America (2004)USA Designates Large Areas of New Mexico and Arizona as Critical Habitat for Jaguars (2014)

Healthy Living Greatly Reduces Likelihood of Dying from Cancer

Posted on May 28, 2016  Comments (1)

Lifestyle choices can greatly reduce the incidence and death rates from cancer. 4 factors can reduce the incidence of cancer by up to 40% and death rate by 50%: don’t smoke, don’t drink alcohol in excess, maintain a BMI between 18.5 and 27.5, and exercising at a moderate intensity for at least 150 minutes or at a vigorous intensity for at least 75 minutes every week.

Preventable Incidence and Mortality of Carcinoma Associated With Lifestyle Factors Among White Adults in the United States

A substantial cancer burden may be prevented through lifestyle modification. Primary prevention should remain a priority for cancer control.

Cancer is the second leading cause of death in the United States, with 1.6 million new cancer cases and 0.6 million cancer deaths projected to occur in 2016.1 The cancer mortality rate, age-standardized to the 2000 US standard population, decreased from 199 to 163 per 100 000 between 1969 and 2013.2 However, this decline (17.9%) has been modest compared with the dramatic decrease in heart disease mortality (67.5%) during the same period, highlighting the need for further efforts in cancer prevention and treatment.

The study reviewed previous studies and the makeup of the previous studies and available statistics. As they state in the paper: “Because our cohorts’ participants were predominantly whites, to avoid any influence of different racial distributions on the comparison with the general population, we only included whites in the analysis.” They also excluded about 10% of cancers that are believed to have strong environmental factors.

Table Showing a Comparison of Lifestyle Factors in the Low- and High-Risk Groups

In the 2 cohort studies of US white individuals, we found that overall, 20% to 40% of carcinoma cases and about half of carcinoma deaths can be potentially prevented through lifestyle modification. Not surprisingly, these figures increased to 40% to 70% when assessed with regard to the broader US population of whites, which has a much worse lifestyle pattern than our cohorts.

Notably, approximately 80% to 90% of lung cancer deaths could be avoided if Americans adopted the lifestyle of the low-risk group, mainly by quitting smoking. For other cancers, from 10% to 70% of deaths could be prevented. These results provide strong support for the importance of environmental factors in cancer risk and reinforce the enormous potential of primary prevention for cancer control.

Related: A Healthy Lifestyle is More About Health Care than the Sickness Management That We Call Health Care IsBetter Health Through: Exercise, Not Smoking, Low Weight, Healthy Diet and Low Alcohol Intake (2013)Exercise Is Really Really Good for YouPhysical Activity for Adults: Inactivity Leads to 5.3 Million Early Deaths a Year (2012)

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