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Opinion, arguments & analyses from guest experts and from the editors of Scientific American

A star buzzing through the outer solar system? Bring it on

A Russian astronomer turned a few heads earlier this month when he published a paper noting that a dwarf star, currently 63 light-years away, will very likely dip into the outer edge of our solar system in fewer than two million years...

March 25, 2010 — John Matson

Astronaut Scott Altman and director Toni Myers talk Hubble 3D

Back in May 2009, the Hubble Space Telescope got its final tune-up. The seven astronauts of the STS-125 mission flew to Hubble on space shuttle Atlantis, grabbed the observatory with a robotic arm and pulled Hubble into the shuttle's open payload bay for repair...

March 24, 2010 — John Matson

Aquatic invasion: Scientists find first amphibious insect species

Several new species of rare Hawaiian moth caterpillars have been discovered to be able to thrive both totally submerged and totally dry. They are the first insects to be described as fully amphibious, reported a team of researchers in a study published online March 22 in the Proceedings of the National Academy of Sciences ...

March 22, 2010 — Katherine Harmon

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