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NASA's Kepler spacecraft is starting to put the pieces together in its search for virtual Earth twins in other planetary systems. Kepler, which launched in 2009 , is on the lookout for planets that are about the size of Earth and have temperate surface conditions. One half of that formula was realized on December 5 when mission scientists announced the discovery of a planet in the so-called habitable zone, called Kepler 22 b , a few times larger than Earth

Peering through a microscope at a plate of cells one day, Ralph M.

Peering through a microscope at a plate of cells one day, Ralph M. Steinman spied something no one had ever seen before.

Click here for Part One: Carl Zimmer on the Art of Science Writing

Click here for Part One: Carl Zimmer on the Art of Science Writing

By Declan Butler of Nature magazine It is a nightmare scenario: a human pandemic caused by the accidental release of a man-made form of the lethal avian influenza virus H5N1. Yet the risk is all too real

By Declan Butler of Nature magazine It is a nightmare scenario: a human pandemic caused by the accidental release of a man-made form of the lethal avian influenza virus H5N1. Yet the risk is all too real.

By Eugenie Samuel Reich of Nature magazine When Kathleen Sebelius, secretary of the U.S.

By Eugenie Samuel Reich of Nature magazine When Kathleen Sebelius, secretary of the U.S.

The death of North Korean leader Kim Jong-il has riveted international attention on the threat of nuclear weapons . Kim was widely reported to have been pursuing nuclear warheads and ballistic missiles to deliver them, and he presided over a pair of nuclear bomb blast tests (confirmed by seismograph). No one outside North Korea knows whether the secretive, totalitarian nation possesses an actual warhead.

The death of North Korean leader Kim Jong-il has riveted international attention on the threat of nuclear weapons . Kim was widely reported to have been pursuing nuclear warheads and ballistic missiles to deliver them, and he presided over a pair of nuclear bomb blast tests (confirmed by seismograph)

Let’s imagine that I suggest you look for lions while we are strolling through the park.

Let’s imagine that I suggest you look for lions while we are strolling through the park.

Click here for Part Two: Carl Zimmer Delves Beneath the Surface of Science Writing

Click here for Part Two: Carl Zimmer Delves Beneath the Surface of Science Writing