Posts filed under “Science”
It was just over two centuries ago that the global population was 1 billion — in 1804. But better medicine and improved agriculture resulted in higher life expectancy for children, dramatically increasing the world population, especially in the West.
As higher standards of living and better health care are reaching more parts of the world, the rates of fertility — and population growth — have started to slow down, though the population will continue to grow for the foreseeable future.
U.N. forecasts suggest the world population could hit a peak of 10.1 billion by 2100 before beginning to decline. But exact numbers are hard to come by — just small variations in fertility rates could mean a population of 15 billion by the end of the century.
Produced by Adam Cole
Cinematography by Maggie Starbard
‘Tractor beams — the ability to trap and move objects using laser light — are the stuff of science fiction, but a team of NASA scientists has won funding to study the concept for remotely capturing planetary or atmospheric particles and delivering them to a robotic rover or orbiting spacecraft for analysis. This animation shows…Read More
The world’s population is expected to hit seven billion in the next few weeks. After growing very slowly for most of human history, the number of people on Earth has more than doubled in the last 50 years. Click below to find out where you fit into this story of human life? Source: The World…Read More
In a nova, gas drawn off one star ends up exploding off the surface of its companion. When you think of a nova explosion, you probably associate it with a supernova—a similar, but fundamentally different, stellar explosion. The word nova is Latin for “new,” referring to what early astronomers thought was a bright new star…Read More
Here is another view of that meteor tearing through an aurora (shown previously here) An Amateur photographer, Tommy Eliassen, composed the image in Ifjord, Finnmark, Norway. Eliassen made the photo on Sept. 25 using a Nikon D700 with a wide angle lens and long exposures between 25-30 seconds: > click for larger photo Source: MSNBC