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One of the most anticipated shuttle launches of all time took place July 8 when Atlantis lifted off at 11:29 A.M.

Polar bears' "mitochondrial Eve," the female from whom all of today's polar bears are descended, was not a polar bear at all. [More]

The likelihood that a baby born in the U.S. will die within its first year is less than a third of what it was 50 years ago

By Jon Cartwright of Nature magazine Sound, like light, can be tricky to manipulate on small scales.

KENNEDY SPACE CENTER-- Atlantis lifted off Friday at 11:29 A.M. Eastern time after a last-moment hold at 31 seconds on its 33rd and final mission--both for it and NASA's 30-year-old manned space shuttle program, putting on hiatus the era of human access to low Earth orbit on board U.S. spacecraft.

Dear EarthTalk : So many chemicals in everyday products are harmful to our health and the environment.

The United States is on the verge of losing its ability to monitor phytoplankton activity in the world's oceans from space, the National Academy of Sciences said yesterday. The loss of satellite-based "ocean color" measurements would be a blow to climate science, because phytoplankton -- tiny ocean plants -- help regulate the global carbon cycle. Like plants on land, phytoplankton produce energy by photosynthesis, pulling carbon dioxide from the atmosphere to fuel the process

CAPE CANAVERAL -- I took this picture last night, and I don’t like it very much. [More]

KENNEDY SPACE CENTER--4:14 A.M.

Atlantis Launch Notes: July 7, 6:00 P.M.

As NASA prepares to wrap up its shuttle program , leaving open questions about what comes next for U.S. human spaceflight, the next big thing in NASA's astronomy program has been dealt a blow

Editor's Note: William Gilly , a professor of biology at Stanford University's Hopkins Marine Station, embarked on new expedition this month to study jumbo squid in the Gulf of California on the National Science Foundation–funded research vessel New Horizon . This is his seventh blog post about the trip. [More]

The 2010 Nobel Prize in Physics raised the profile of graphene --a super strong one-atom thick sheet of carbon atoms arranged in a hexagonal pattern with countless potential commercial applications.

By Richard A. [More]

Citizen scientists can spend some of those long, lazy summer nights helping researchers study diminishing firefly populations [More]