Changing diet in penguins

By studying the tissue remains of penguins in Antarctica, scientists are not only learning more about the modern diet of the continent’s iconic seabird but also what was on the menu thousands of years ago. And that information can provide insight into past climate and penguin behavior, as well as how the species could respond to future climate changes.

Much of their work involves collecting tissue samples, such as eggshells and feathers, from existing penguin colonies and long-extinct ones around the Antarctic Peninsula and the Ross Sea regions. Then they analyze the samples in the lab, looking at the ratios of carbon and nitrogen stable isotopes, which can provide important clues to what’s been on the dinner plate throughout the year.

Now the scientists are testing the idea by looking at gentoos, another Pygoscelis penguin, a mostly subantarctic bird that is pushing its way across the northern end of the Antarctic Peninsula as the climate there warms and the Adélie population declines.

Fun & Interesting Facts About planet Pluto

• Pluto is only about half the width of the United States. Charon is about half the size of Pluto. Charon is the largest moon compared to the body it orbits (whether planet or dwarf planet) of any moon in the solar system.

• Almost all the planets travel around the Sun in nearly perfect circles. But Pluto does not. It takes an oval-shaped path with the Sun nowhere near its center. What's more, its path is quite tilted from the nice, orderly plane where all the other planets orbit. (Mercury has a slightly lop-sided orbit, although not nearly so much as Pluto's.)

• If you lived on Pluto, you'd have to live 248 Earth years to celebrate your first birthday in Pluto-years.

• If you lived on Pluto, you would see Charon from only one side of the planet. Charon's orbit around Pluto takes about six and one-half Earth days. Pluto's day (that is, one complete rotation) takes exactly the same amount of time. So, Charon always "hovers" over the same spot on Pluto's surface, and the same side of Charon always faces Pluto.

• At Pluto's current distance from the Sun, the temperature on its surface is about 400 degrees below zero Fahrenheit! It will get even colder as it moves farther from the Sun. From Pluto, the Sun looks like just a bright dot in the sky, the brightest star visible. The light from the Sun is as bright on Pluto as the light from the full Moon is on Earth.

• If you weigh 100 pounds on Earth, you would weigh only 7 pounds on Pluto!

• Pluto orbits in a far-out region of the solar system called the Kuiper (rhymes with viper) Belt. There are lots of icy, rocky objects out there. But they are so far from the Sun they are really hard to see, even with powerful telescopes.

A Message for Men about Health

Men may be catching up to women in lifespan. The life-expectancy gap between men and women has shrunk to 5.2 years, the narrowest since 1946. But men still need to pay more attention to their health. Why?

Compared to women, men are more likely to:

• Smoke and drink more, and generally lead less healthy lifestyles
• Put off routine checkups and even ignore symptoms of a health problem
• Join in fearless, risky, and dangerous behaviors

Working-aged men also are less likely than women to have a regular doctor.
The good news is that many of the diseases and health conditions that men face can be prevented — or treated if they are found early. To start taking better care of your health, learn about your risk factors. Risk factors are things in your life that increase your chances of getting a certain disease. Some risk factors you cannot change, such as your age or family history. But many are in your control. Find out what you can do to lower your risk factors and improve your overall health. Next, find out how often you should see a doctor for routine checkups and what screenings, tests, and vaccines you might need. By taking these steps, you will feel good knowing you are doing all you can to take charge of your health.

Small Technology to Clean Up Big Pollution Problems

EPA scientists are exploring ways to use some very small materials to clean up some very big environmental troubles. Research chemist Dr. Souhail Al-Abed and his colleagues have synthesized stimulated carbon with nanoparticles of iron/palladium bimetallic to construct a new nano-scale treatment to clean up pollutants. The new, tiny technology is offering promise where unadventurous technologies have been limited in detecting, treating, removing, and preventing environmental contaminants.

The research is proving particularly useful in dealing with PCBs, a family of persistent organic chemicals that have been linked to a host of dangerous health effects, including cancer. Dr. Al-Abed and his research group found that infusing the carbon with nanoparticles not only made it more effective at adsorbing contaminants, but also degraded the PCBs to less dangerous compounds.

Antarctica, Greenland helps scientists to understand past climate

Ice cores from Antarctica, Greenland and elsewhere in the world serve as a way for scientists to travel back in time to understand past climate. They analyze such things as the trapped bubbles of gas, chemicals, insoluble dust and trace metals found in the ice to reconstruct the cycles of glacial advance and retreat, the waxing and waning of temperature, the sudden appearance of droughts and volcanic eruptions.

But those long, skinny cylinders of ice can only tell so much of the story, according to Ryan Bay, a research physicist at the University of California Berkley. Bay and colleagues use an instrument they developed called an optical dust logger to measure the dust and particulates, or bits of matter, not captured by the original ice core.

Bay and team member Delia Tosi will take the latest and greatest version of their optical dust logger to Antarctica this coming field season. They’ll send the instrument down the deepest hole ever drilled in the ice sheet, where European scientists recovered the oldest ice to date from a high-altitude spot on the polar plateau called Dome C in East Antarctica.

The 3,270-meter-long ice core drilled by the European Project for Ice Coring in Antarctica (EPICA) reaches back at least 800,000 years. Bay said he is particularly interested in the last 100,000 years of climate history and finding signatures of volcanic eruptions and impacts from comets or asteroids that may have caused abrupt climate changes.

For instance, a major volcanic eruption can send a great amount of sulfate particles into the atmosphere. The sulfate aerosols reflect sunlight, effectively shielding the lower atmosphere of the planet and cooling it near the surface. Bay said this abrupt cooling event could then affect the succeeding climate for millennia.

Nokia Booklet 3G

A new portable device from Nokia, Nokia Booklet 3G is a small laptop PC witness the company step foot on computers.
Features:
Display: 10.1-inch HD display
Screen: 720p HD screen
Battery life: 12 hours
HDMI port for HD video out
Aluminium shell which measures in at just 2cm thin and tips the scales at around a kilogram to ensure it’s extremely portable.

Discovery’s next launch on Friday at 12:22 a.m

Teams at Kennedy Space Center have completed a portion of the testing of a liquid hydrogen fill and drain valve in space shuttle Discovery’s main propulsion system. The valve opened and closed when commanded five different times with no issues. This “cycle testing” of Discovery began at 6:28 p.m. EDT and finished at 6:59 p.m.

Teams are now performing a pressure test of the propulsion system, and recording the leak rate of small amounts of liquid hydrogen. Data from tonight’s tests will be brought to tomorrow’s mission management team for evaluation at the noon meeting.

NASA is targeting Discovery’s next launch attempt for no earlier than Friday, Aug. 28 at 12:22 a.m., depending on the results of the testing and a review of the data by the mission management team.

Discovery’s countdown is expected to resume at the T-11 hour point at 8:57 a.m. tomorrow.