| Mammoth Mystery - July 2008 A pair of mammoth skeletons is found locked together by their tusks. What happened? | |
| Marathon Mouse - July 2009 With an "exercise pill," researchers turn couch-potato rodents into champion runners. | |
| Mass Extinction - Nov. 2006 What caused the mother of all extinctions 250 million years ago? | |
| Maya - Jan. 2007 NASA archeologists use satellites to pinpoint ancient ruins buried deep in the jungle. | |
| Moon Smasher - July 2009 A NASA satellite called LCROSS heads to the moon in the hope of finding buried water. | |
| Of Mice and Memory - Jun. 2008 Mice placed in enriched environments can recover lost memories, giving hope to those who study Alzheimer's. | |
| Mirror Neurons - Jan. 2005 A recently discovered system in the brain may help explain why we humans can get so worked up watching other people. | |
| Obesity - Oct. 2006 Examine the biology behind the compulsion to eat. | |
| Pandemic Flu - Jan. 2006 Will the virus that causes bird flu develop the ability to move from person to person? | |
| Papyrus - Nov. 2006 Scraps of writings from a garbage dump in ancient Egypt reveal what life was like 2,000 years ago. | |
| Personal DNA Testing - Jul. 2008 Genetic testing to assess risk factors for a handful of serious illnesses is now commercially available. But is it a good idea? | |
| Phoenix Mars Lander - July 2008 NASA's latest robot has already found frozen water and is looking for more signs that the Red Planet could support life. | |
| Profile: Maydianne Andrade - July 2009 By peering into the sex lives of black widow spiders, this evolutionary biologist has shown the upside of cannibalism. | |
| Profile: Bonnie Bassler - Jan. 2007 Her insight into how bacteria "talk" has launched a revolution in biological and medical research. | |
| Profile: Sangeeta Bhatia - July 2009 Intrigued by the idea of artificial organs, a biomedical engineer uses computer-chip technology to craft tiny livers. | |
| Profile: Cynthia Breazeal - Nov. 2006 A daring engineer designs robots to communicate and interact the way people do. | |
| Profile: Brothers Chudnovsky - Jul. 2005 The story of two brilliant mathematicians, a unicorn, and a homemade supercomputer | |
| Profile: Tyler Curiel - Jan. 2006 In the midst of Hurricane Katrina a cancer researcher risks everything to save a medical treasure. | |
| Profile: Franklin Chang-Díaz - July 2009 The first Latino-American astronaut is also a scientist designing a new generation of plasma-powered space vehicles. | |
| Profile: Hany Farid - Jun. 2008 This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked. | |
| Profile: Judah Folkman - July 2008 Once scorned for his ideas about how cancer grows, the late Judah Folkman is now hailed as a visionary. | |
| Profile: Naomi Halas - Apr. 2005 Naomi Halas is a pioneering nanotechnologist bent on seeing practical applications for her work—and soon. | |
| Profile: Karl Iagnemma - Oct. 2006 An innovative MIT roboticist is also an acclaimed fiction writer. | |
| Profile: Erich Jarvis - Oct. 2005 The work of neuroscientist Erich Jarvis demonstrates the power of open-mindedness in the lab. | |
| Profile: Yoky Matsuoka - July 2008 A former tennis prodigy aims to create advanced prosthetic limbs controlled by human thought. | |
| Profile: James McLurkin - Jan. 2005 James McLurkin of MIT is one of the world's leading designers of robot "swarms"—groups of robots that work together for a greater purpose. | |
| Profile: Arlie Petters - Jul. 2007 A boy from a rural village in Belize grows up to become a world-class mathematician and cosmologist. | |
| Profile: Alfredo Quiñones-Hinojosa - July 2008 He jumped the fence from Mexico to work as a farmhand and ended up a leading brain surgeon. | |
| Profile: Pardis Sabeti - Jul. 2008 By night she's a rocker. By day, she's a Harvard geneticist tracking the evolution of the human genome. | |
| Profile: Julie Schablitsky - Jul. 2007 Meet an archeologist who is helping to rewrite the history of the Old West. | |
| Profile: Lonnie Thompson - July 2009 A climatologist struggles to save ancient history preserved in ice that is now melting. | |
| Profile: Luis von Ahn - June 2009 A computer scientist finds novel ways to stop spammers and harness the brainpower of millions of people. | |
| Profile: Edith Widder - July 2008 Meet a marine biologist and explorer who has engineered new ways to spy on deep-sea creatures. | |
| Public Genomes - Aug. 2009 Thousands of people are signing up to post their DNA sequences on the Internet, for all to see. Are they crazy? | |
| RNAi - Jul. 2005 A wayward petunia leads to the discovery of modest little molecules with enormous medical promise. | |
| Saving Hubble - July 2008 Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope. | |
| The Science of Picky Eaters - July 2009 Don't like broccoli? Your DNA may explain why. | |
| The Search for ET - July 2008 Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there? | |
| Secrets in the Salt - July 2009 Salt deposits that formed 250 million years ago hold tantalizing hints of early life. | |
| Sleep - Jul. 2007 Why do we need sleep? Part of the answer may be to strengthen memories. | |
| Smart Bridges - July 2008 Can we engineer bridges that tell us what's wrong with them before it's too late? | |
| Smart Sea Lions and Talking Walruses - July 2009 Marine mammals are wowing researchers with more than just circus tricks. | |
| Space Elevator - Jan. 2007 Can we build a 22,000-mile-high cable to transport cargo and people into space? | |
| Space Storms - July 2008 Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth. | |
| Stem Cells - Apr. 2005 What are they, and how do we find a balance between hope for cures and respect for life? | |
| Stem Cells Breakthrough - July 2008 Three separate teams overcome a biomedical hurdle—creating stem cells without the use of human embryos. | |
| Stem Cells Update - Jan. 2006 A new technique for creating stem cells may ease ethical concerns. | |
| Stronger Hurricanes - Jan. 2006 Is global warming making hurricanes more intense? | |
| 10th Planet - Jan. 2006 A stunning discovery at the far reaches of our solar system raises questions about what makes a planet a planet. | |
| T. Rex - Apr. 2005 An astonishing adolescent growth spurt accounts for T. rex's enormous size. | |
| T. Rex Blood? - Jul. 2007 Preserved soft tissue, including possible blood vessels and red blood cells, are turning up in dinosaur fossils. | |
| Twin Prime Conjecture - Jan. 2006 New insight into a 2,300-year-old mystery surrounding prime numbers inspires a song. | |
| Wisdom of the Crowd - Jun. 2008 Ask enough people to estimate something, and their combined guesses will get you surprisingly close to the right answer. | |