Astronomy Picture of the Day
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Updated: 20 Aug 21:09
Earth's Shadow
20 Aug 21:09
Earth's Shadow
Credit & Copyright: Anthony Ayiomamitis (TWAN)
Explanation: The dark, inner shadow of planet Earth is called the umbra. Shaped like a cone extending into space, the umbra has a circular cross section that can be most easily seen during a lunar eclipse. For example, last Saturday the Full Moon slid across the northern edge of the umbra. Entertaining moon watchers throughout Earth's eastern hemisphere, the lunar passage created a deep but partial lunar eclipse. This composite image uses successive pictures recorded during the eclipse from Athens, Greece to trace out a large part of the umbra's curved edge. The result nicely illustrates the relative size of the umbra's cross section at the distance of the Moon, as well as the Moon's path through the Earth's shadow.
NOVA | PBS
NOVA brings you short audio stories from the world of science -- anything from hurricanes to mummies to neutrinos. For more science programming online and on air, visit NOVA's Web site at pbs.org/nova, or watch NOVA broadcasts Tuesday nights on PBS.
Updated: 20 Aug 21:11
Wired for Weight
18 Aug 22:00
In this podcast, NOVA scienceNOW correspondent David Duncan talks to Dr. Jeffrey Friedman of Rockefeller University about the connection between genetics and obesity. Audio editing by David Levin. Produced by Dean Irwin. Interview conducted by David Duncan. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
In this podcast, NOVA scienceNOW correspondent David Duncan talks to Dr. Jeffrey Friedman of Rockefeller University about the connection between genetics and obesity. Audio editing by David Levin. Produced by Dean Irwin. Interview conducted by David Duncan. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
Mother of All Extinctions
13 Aug 21:00
NOVA scienceNOW producer Joe McMaster asks our series host, Neil deGrasse Tyson, why everyone should know about the Permian extinction. Produced by Susan K. Lewis. Audio editing by David Levin. Interview conducted by Joe McMaster. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
NOVA scienceNOW producer Joe McMaster asks our series host, Neil deGrasse Tyson, why everyone should know about the Permian extinction. Produced by Susan K. Lewis. Audio editing by David Levin. Interview conducted by Joe McMaster. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
Extinction Happens
11 Aug 22:00
NOVA scienceNOW producer Julia Cort talks to MIT geologist Sam Bowring about a mass extinction at the end of the Permian period and discusses whether it could happen again. Audio editing by David Levin. Produced by Susan K. Lewis. Interview with Sam Bowring conducted by Julia Cort. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
NOVA scienceNOW producer Julia Cort talks to MIT geologist Sam Bowring about a mass extinction at the end of the Permian period and discusses whether it could happen again. Audio editing by David Levin. Produced by Susan K. Lewis. Interview with Sam Bowring conducted by Julia Cort. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
Longevity Gene
08 Aug 22:00
NOVA scienceNOW producer Chad Cohen describes a new study that may link longevity to a gene controlling a certain type of cholesterol. Produced by Chad Cohen and Lexi Krock. Audio editing by David Levin. Interviews conducted by Chad Cohen. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
NOVA scienceNOW producer Chad Cohen describes a new study that may link longevity to a gene controlling a certain type of cholesterol. Produced by Chad Cohen and Lexi Krock. Audio editing by David Levin. Interviews conducted by Chad Cohen. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
Bacteria Unite!
08 Aug 22:00
Bonnie Bassler of Princeton University explains how bacteria can "talk" with one another, and even join together in coordinated efforts. Scientists are beginning to see these microscopic creatures-once thought completely asocial-in a whole new way. Podcast produced by Susan K. Lewis and edited by David Levin. Interview by Carla Denley. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
Bonnie Bassler of Princeton University explains how bacteria can "talk" with one another, and even join together in coordinated efforts. Scientists are beginning to see these microscopic creatures-once thought completely asocial-in a whole new way. Podcast produced by Susan K. Lewis and edited by David Levin. Interview by Carla Denley. NOVA is produced by WGBH in Boston. Major funding for NOVA scienceNOW is provided by Pfizer, the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and public television viewers. This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. For more fun science stories, visit our Web site at http://www.pbs.org/nova/sciencenow
TIME.com: Top Science and Health Stories
Top Science and Health Stories on TIME.com
Updated: 20 Aug 21:07
Helping the Hidden Community of HIV
20 Aug 00:15
To help stem the spread of the HIV epidemic, public health officials are making a renewed effort to reach out to closeted gay men in oppressive societies
Drilling for Oil Way, Way Offshore
20 Aug 00:15
Rising oil prices may lead to more drilling offshore in the U.S., but the real environmental harm will likely be borne far overseas, by poor countries in South America
Beijing Smog Cleanup: Has It Worked?
20 Aug 00:15
Chinese officials implemented $17 billion in antipollution programs before the start of the Games. The skies are clearer, but simple meteorology may be the chief reason why
Coastal Dead Zones Are Growing
20 Aug 00:15
Scientists say the number of coastal dead zones has doubled since 2006, to the detriment of already troubled fisheries
Statistical Studies vs. Good Medicine
20 Aug 00:15
Insurance companies and hospital administrators like evidence-based research. For doctors and patients, sometimes it's more complicated
Apple tries to de-bug iPhone
20 Aug 04:07
Apple (AAPL) acknowledged Tuesday that a software update for the iPhone partly fixes the connection snags that have caused a ...
Apple (AAPL) acknowledged Tuesday that a software update for the iPhone partly fixes the connection snags that have caused a ...
Martin wants broadband across USA
20 Aug 03:50
High-speed Internet access is so important to the welfare of U.S. consumers that America can't afford not to offer it free of ...
High-speed Internet access is so important to the welfare of U.S. consumers that America can't afford not to offer it free of ...
HP delivers strong sales in 3rd quarter
20 Aug 01:13
Hewlett-Packard (HPQ) reported impressive quarterly results Tuesday, but warned that strong sales are not necessarily a sign ...
Hewlett-Packard (HPQ) reported impressive quarterly results Tuesday, but warned that strong sales are not necessarily a sign ...
The storied history of the word 'planet'
19 Aug 18:43
The word "planet" has meant many different things over the millennia and even still its definition is evolving.
The word "planet" has meant many different things over the millennia and even still its definition is evolving.
Scientists make red blood cells from embryonic stem cells
19 Aug 18:30
Scientists say they've found an efficient way to make red blood cells from human embryonic stem cells, a possible step toward ...
Scientists say they've found an efficient way to make red blood cells from human embryonic stem cells, a possible step toward ...
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