Today is officially (according to someone) Pi Day. March 14. How clever indeed.

Anyway, to celebrate, check out the official website. Be sure to see what Pi to the millionth digit looks like.

New pictures of Saturn’s rings just released by our buddies at NASA.

Nice movie of our moon crossing the sun when a bunch of lucky nerds were calibrating their instruments.

This one is long and has been around a while, but damn cool. Probably completely useless as well, but damn cool.

We can keep on screwin’!

Original article

Fact or Fiction?: Living People Outnumber the Dead
Booming population growth among the living, according to one rumor, outpaces the dead
By Ciara Curtin

The human population has swelled so much that people alive today outnumber all those who have ever lived, says a factoid whose roots stretch back to the 1970s. Some versions of this widely circulating rumor claim that 75 percent of all people ever born are currently alive. Yet, despite a quadrupling of the population in the past century, the number of people alive today is still dwarfed by the number of people who have ever lived.

In 2002 Carl Haub, a demographer at the Population Reference Bureau, a nongovernmental organization in Washington, D.C., updated his earlier estimate of the number of people that have ever existed. To calculate this, he studied the available population data to determine the human population growth rates during different historical periods, and used them to determine the number of people who have ever been born.

For most of history, the population grew slowly, if at all. According to the United Nations’ Determinants and Consequences of Population Trends, the first Homo sapiens appeared around 50,000 years ago, though this figure is debatable. Little is known about this distant past and how many of us there might have been, but by the time of the agricultural revolution in the Middle East in 9000 B.C., Earth held an estimated five million people.

Between the rise of farming and the height of Roman rule,population growth was sluggish; at less than a tenth of a percent per year, it crawled to about 300 million by A.D. 1. Then the total fell as plagues wiped out large swathes of people. (The “black death” in the 14th century wiped out at least 75 million.) As a result, by 1650 the world population had only increased to about 500 million. By 1800, though, thanks to improved agriculture and sanitation, it doubled to more than one billion. And, in 2002 when Haub last made these calculations, the planet’s population had exploded, reaching 6.2 billion.

To calculate how many people have ever lived, Haub followed a minimalist approach, beginning with two people in 50000 B.C.—his Adam and Eve. Then, using his historical growth rates and population benchmarks, he estimated that slightly over 106 billion people had ever been born. Of those, people alive today comprise only 6 percent, nowhere near 75 percent. “[It is] almost surely true people alive today are some small fraction of [all] people,” says Joel Cohen, a professor of populations at the Rockefeller and Columbia Universities in New York City.

For this myth ever to be valid there would have to be more than 100 billion people living on Earth. “How cozy,” Cohen says. “It just doesn’t seem plausible,” he adds.

Today there are more than 6.5 billion people walking on Earth, according to United Nations estimates. Recently, the population has been increasing by about 1.2 percent each year, down from the late 1960s peak of a 2.1 percent yearly growth rate. Some industrialized countries, especially France and Japan, have very low birth rates and their populations are actually dwindling, Haub notes. In developing nations populations continue to grow, but some countries, such as India, are experiencing a slowdown in their growth rate.

Cohen doubts that a doubling of today’s population, to 13 billion, will occur, never mind approaching anywhere near 100 billion. Not even the U.N.’s highest projection predicts that much growth, he says. For 2050, the world body’s estimates range from 7.3 billion to 10.7 billion people. The median, and most likely, projection of 8.9 billion relies on a gradual slowing of the growth rate. And the U.N. predicts the world population will stabilize at 10 billion inhabitants sometime after 2200. At this rate, the living will never outnumber the dead.

Coming to a theater near you…

The primates use the weapons to hunt small mammals for food.

From Times Wire Services

February 23, 2007

click to enlarge

WASHINGTON — Chimpanzees living on the West African savanna have been observed fashioning spears from sticks and using them to hunt small mammals — the first routine production of deadly weapons observed in animals other than humans.

The chimps were repeatedly seen using their hands and teeth to tear the side branches off long straight sticks and peeling back the bark and sharpening one end of the sticks with their teeth, the researchers report in Thursday’s online issue of the journal Current Biology. Then, grasping the weapon in a “power grip,” they jabbed into tree-branch hollows where bush babies — small monkey-like mammals — sleep during the day.

After stabbing their prey, they removed the injured or dead animal and ate it.

Lead researcher Jill D. Pruetz of Iowa State University in Ames said it reminded her of the shower scene in “Psycho.”

The new observations are “stunning,” said Craig Stanford, a primatologist and professor of anthropology at USC.

“Really fashioning a weapon to get food — I’d say that’s a first for any nonhuman animal.”

Fellow researcher Paco Bertolani of Cambridge University in England saw an adolescent female chimp use a spear to stab a bush baby as it slept in a tree hollow, pull it out and eat it.

Pruetz thought it was a fluke, but then saw similar weapon- making herself “over the course of 19 days almost daily,” she said.

It was typically females who displayed the behavior.

Pruetz and Bertolani were watching the Fongoli community of savanna-dwelling chimpanzees in southeastern Senegal.

Chimps are known to use tools to crack open nuts and fish for termites. Some birds use tools, as do other animals such as gorillas, orangutans and even naked mole rats.

The chimps’ hunting method usually failed, the researchers said. The studied apes mostly eat fruit, bark and legumes.