Ronald Heifetz has been a professor of public leadership at Harvard's Kennedy School for three decades, teaching classes that have included aspiring business leaders and budding heads of state. Each year, he says, the students start his course thinking they'll learn the answer to one question:
As leaders, how can they get others to follow them?
With a Swiss forensics investigation pointing to polonium-210 as a possible cause of Yasser Arafat's death, the radioactive element is back in the news.
Confirming whether the Palestinian leader died from an assassination attempt will be difficult, given polonium's short half-life and the fact that Arafat has been dead nine years, science writer Deborah Blum says.
Whatever happened to Arafat, polonium does have a deadly history.
These NASA/ESA Hubble Space Telescope images reveal a never-before-seen set of six comet-like tails radiating from a body in the asteroid belt designated P/2013 P5.
Credit NASA, ESA, D. Jewitt (University of California, Los Angeles), J. Agarwal (Max Planck Institute for Solar System Research), H. Weaver (Johns Hopkins University Applied Physics Laboratory), M. Mutchler (STScI), and S. Larson (University of Arizona)
Astronomers using both ground- and space-based telescopes have discovered a new kind of asteroid that sports not one, but six comet-like tails, and has been described as looking something like a rotating lawn sprinkler.
P/2013 P5 was first spotted with the Pan-STARRS 1 telescope at the top of Haleakala volcano in Maui, Hawaii, in August and then followed up with more detailed observations using the Hubble Space Telescope.
Originally published on Fri November 8, 2013 1:23 pm
By Andrew Prince
National Geodetic Survey crew members Roy Anderson, left, and Steve Breidenbach set up survey equipment used to measure the height of the Washington Monument.
Credit National Geodetic Survey/NOAA
The National Geodetic Survey doesn't often get the opportunity to take detailed measurements of the massive stone obelisk that sits in the middle of Washington, D.C.
But a 2011 earthquake in nearby Mineral, Va., damaged the Washington Monument enough that to repair it, the tower had to be wrapped in scaffolding. That gave surveyors access to the very top of the structure.
Legend holds that the length of a woolly bear caterpillar's color bands can be used to forecast how severe the winter weather will be. The myth dates back to colonial American folklore but was popularized by a 1948 study. SciFri finds out if there's any truth to the lore, and what the caterpillar's fuzzy bristles are really used for.
This week, India launched Mangalyaan, its first robotic mission to orbit Mars and probe its atmosphere. Only Russia, Europe, and the U.S. have successfully orbited the planet. Joan Johnson-Freese, a professor in national security affairs, and planetary scientist Bruce Jakosky discuss the Indian space program, as well as NASA's upcoming mission to the Martian atmosphere.
Echinacea, vitamins, and other dietary supplements have become a $5 billion industry, but the products don't need to be pre-approved by the FDA before they go on the market. How do we know what is really in our supplements? What regulations are currently in place? How can we keep ourselves safe and informed?