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Costa Rica, a tropical country known for its national parks and ecotourism, has proposed a further step to protect its environment: a ban on all hunting. But even in this environmentally conscious nation, the legislation faces obstacles. This podcast was produced by Sam Eaton for NOVA and PRI's "The World." For more global environmental stories, visit: http://www.pbs.org/wgbh/nova/earth/ http://www.theworld.org/category/topics/environment/ NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and PBS viewers.

Could climate change be contributing to extreme weather events like Hurricane Sandy? Jennifer Francis, a climatologist at Rutgers University in New Jersey, believes that may be the case. In fact, her research shows that Arctic warming may have contributed to many of the extreme weather events of the past few years. Sam Eaton reports from New Jersey. This podcast was produced by Sam Eaton for NOVA and PRI's "The World." For more global environmental stories, visit: http://www.pbs.org/wgbh/nova/earth/ http://www.theworld.org/category/topics/environment/ NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, Lockheed Martin Corporation, and PBS viewers.

Marine biologist Colleen Reichmuth says that few mammals can match the vocal talents of the walrus. Produced by David Levin. Original interview by Doug Hamilton. Learn more at pbs.org/nova NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, the Lockheed Martin Corporation, and PBS viewers.

NOVA scienceNOW's Dean Irwin discusses what he learned about this new computer technology while producing his story on digital art authentication. Podcast produced by David Levin. Music by Jeff Allen. NOVA is produced by WGBH in Boston. Funding for NOVA scienceNOW is provided by the National Science Foundation, the Howard Hughes Medical Institute, the Alfred P. Sloan Foundation, and PBS Viewers. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, the Lockheed Martin Corporation, and PBS 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

Anthropologist Barbara Macleod says that studying the ancient Maya language offers a unique window into the past. Podcast produced by David Levin. Interview by Rima Chaddha. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, the Lockheed Martin Corporation, and PBS viewers. Major funding for "Cracking the Maya Code" is provided by the National Science Foundation and the National Endowment for the Humanities, with additional funding provided by The Solow Art and Architecture Foundation. This material is based upon work supported by the National Science Foundation under Grant No. 0407101. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Any views, findings, conclusions, or recommendations expressed in this video podcast do not necessarily represent those of the

Cosmologist Stephon Alexander says he'd be surprised if we didn't find the Higgs particle. Podcast produced by David Levin and Rima Chaddha, with audio editing by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Physicist Leonard Susskind says that Einstein radically changed the way we think about space, but his equations can't explain exactly what it is. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Physicist Alan Guth says that the concept of "space" is more complicated than you might think. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Physicist Max Tegmark says that researchers still don't fully understand what time is. It's one of the biggest mysteries in physics. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

The concept of "Space," is a tough one to explain--even for a Nobel prize-winnig physicist like Steven Weinberg. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Physicist Janna Levin says that Einstein and Newton had very different ideas about what space and time really were. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Peter Gallison is a physicist and historian of science. He says that although humans may sense time as moving constantly forward, it doesn't really work that way. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Physicist Jim Gates says that even after you take all the matter out of the universe, space still wouldn't be empty. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

To most of us, time seems like a one-way street, moving from past to future. But physicists like Sean Carroll have a different way of thinking about it. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

In the months after 9/11, New York City faced a difficult decision. What should it do with the site where the twin towers once stood? For architecture critic Paul Goldberger, there was only one choice: rebuild. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more science stories, visit our website at pbs.org/nova

Could permafrost under Martian soil be the key to finding life on the red planet? Chris McKay, a planetary scientist for NASA, thinks there's a good chance we'll see evidence of ancient microbes if we just follow the ice. Podcast produced by David Levin. Interview by Anna Lee Strachan. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. For more fun science stories, visit our website at pbs.org/nova/mars

For thousands of years, people around the world have modified their bodies with tattoos and piercings. But some cultures, like the ancient Inca in Peru, took that practice beyond skin deep. They sometimes used ropes and boards to slowly change the shape of human skulls. It's a process called "cranial modification." In this podcast, bioarcheologist Valerie Andrushko explains. Podcast produced by David Levin. Original interview by Melissa Salpietra. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. To learn more, go to pbs.org/nova/machupicchu

In this podcast, marine biologist Roger Hanlon explains why octopuses are masters of camouflage. Podcast produced by David Levin. Interview by Susan Lewis. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by ExxonMobil, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. Learn more about the remarkable camouflage of octopuses--and their cousins, cuttlefish--on pbs.org/nova/camo.

In this podcast, we spoke to former NASA Public Affairs Officer Steve Nesbitt. Nesbitt announced more than a dozen Space Shuttle missions, giving play-by-play radio commentary as the craft flew into orbit. Nesbitt spoke to us about his experience as the public voice of NASA the early days of the Shuttle program, and gave his thoughts on its retirement. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. You can learn more about the space shuttle, and the missions NASA is planning after its retirement at pbs.org/nova.

In this podcast, learn why studying the emotions of our close primate relatives--chimpanzees and bonobos--might shed light on the evolution of human culture. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. You can learn more about bonobos, chimps, and what makes us human on pbs.org/nova/sciencenow.