Time is running short. When the IPCC published its first scientific report in 1990 on the possibility of human-caused global warming, the atmospheric concentration of carbon dioxide (CO2) was 354 ppm. It is now 397 ppm and rising. In spite of Kyoto, Copenhagen, Cancun, Durban, and Doha, atmospheric CO2 continues its inexorable upward path.
It pays to be nice. One of the most absolutely, emphatically wrong hypotheses about the oceans was coined by one of the most carefree and amiable people in nineteenth century science. It should have sunk his reputation without trace. Yet, it did not.
It is likely that most ecologists have their own stories regarding the annual meetings of the Ecological Society of America (ESA), the world’s largest organization of professional ecologists. Some revere it, whereas others may criticize it. There is, however, truth in numbers—growth in attendance has been seemingly exponential since my first meeting in the early 1980’s.
What does it mean for a woman to “feel sexy”? In our current consumer culture, the idea of achieving sexiness is all-pervasive: an expectation of contemporary femininity, wrapped up in objects ranging from underwear, shoes, sex toys, and erotic novels. Particular celebrities and “sex symbol” icons, ranging throughout the decades, are said to embody it…
The past couple of years have seen the celebration of a number of key developments in the history of physics. In 1913 Niels Bohr, perhaps the second most famous physicist of the 20th century after Einstein, published is iconic theory of the atom.
Lipids (fats and oils) have historically been thought to elevate weight and blood cholesterol and have therefore been considered to have a negative influence on the body. Foods such as full-fat milk and cheese have been avoided by many consumers for this reason. This attitude has been changing in recent years.
Social media and other technologies have changed how we communicate. Consider how we coordinate events and contact our friends and family members today, versus how we did it 20 or 30 years ago. Today, we often text, email or communicate through social media more frequently than we phone or get together in person.
At the end of last year, Eli Lilly’s mega-blockbuster antidepressant Cymbalta went off patent. And Cymbalta’s generic version, known as duloxetine, rushes in the market and drives down the price, making it more affordable.
Now that the Internet has been with us for over 25 years, what are we to make of all the concerns about how this new medium is affecting us, especially the young digital natives who know more about how to maneuver in this space than most adults.
Someone asked me at a recent book talk why I chose to write about hope and children in poverty. They asked whether it was frivolous to write about such a topic at a time when children are experiencing the challenges associated with poverty and economic disadvantage at high rates.
That any person could become an expert in something if they simply spend about 3 hours per day for ten years is an appealing concept. This idea, first championed by Ericsson and brought to prominence by Gladwell, has now taken root in the popular media. It attempts to discuss these differences in terms of the environment. The idea is that practice with the purpose of constantly gathering feedback and improving can lead any person to become an expert.
By Béla Büki
Benign paroxysmal positional vertigo (BPPV) is a very frequent cause of harmless but unpleasant vertigo and dizziness complaints. It is caused by dislodged otoconia floating into the semicircular canals, which measure angular accelerations of the head and initiate corrective eye movements during fast head movements. Otoconia are calcium-carbonate crystals functioning as weights in the miniature acceleration sensors in the inner ear, informing us about gravity and linear accelerations.
By Robert Hull and Eric Rossen
Since 1 October 2013, the United States has detained over 57,000 unaccompanied minors from Central America crossing the border from in an attempt to escape severe violence. Makeshift immigration shelters emerged, with emergency responders providing medical attention and care.
By Marjorie Senechal
It was eerie, a gift from the grave. But I thank serendipity, not spooks. The gift, it turns out, was given forty years ago.
As soon as humanity began its quest for knowledge, people have also attempted to organize that knowledge. From the invention of writing to the abacus, from medieval manuscripts to modern paperbacks, from microfiche to the Internet, our attempt to understand the world — and catalog it in an orderly fashion with dictionaries, encyclopedias, libraries, and databases — has evolved with new technologies.
By Siu-Lan Tan
Films trick our senses in many ways. Most fundamentally, there’s the illusion of motion as “moving pictures” don’t really move at all. Static images shown at a rate of 24 frames per second can give the semblance of motion. Slower frame rates tend to make movements appear choppy or jittery. But film advancing at about 24 frames per second gives us a sufficient impression of fluid motion.