A piece of Mars: The swirly candy stripes in these big dark dunes are layers inside that have been made visible by wind erosion (the scene is 1.5×0.9 km, or 0.93×0.56 mi). It’s rare to see the inside structure of dunes like this, but these are being eroded by wind blowing from the upper right. For similar examples on Earth, check out The Wave. (HiRISE ESP_037200_1765, NASA/JPL/Univ. of Arizona)
A planet is a planet is a planet. Unless it’s Pluto – then it’s a dwarf planet. But even then it’s a planet, according to experts. So what was behind the unpopular re-classification of Pluto by astronomers, and were they justified?
As the New Horizons spacecraft closes in on this small body, one planetary scientist says that this dwarf planet could be more typical of planets than Mars, Mercury, and Saturn. And that our solar system has not 8 or even 9 planets, but 900.
Also, meet a type of planet that’s surprisingly commonplace, although we don’t have one in our solar system: super Earths. Could they harbor life?
And the DAWN mission continues its visit to the two most massive residents of the asteroid belt: Vesta and Ceres. Discover what these proto-planets may reveal to us about the early solar system.Guests:
- Alan Stern – Planetary scientist, Southwest Research Institute, Principal Investigator of the New Horizons mission
- Marc Rayman – DAWN Mission chief engineer and mission director
- David Stevenson – Professor of planetary science at CalTech
- Rebekah Dawson – Astronomer, postdoctoral fellow at the University of California, Berkeley
- David Eicher – Editor-in-chief, Astronomy Magazine
A piece of Mars: This scene (509×382 m, or 1670×1253 ft), aside from showing some lovely rippled dunes, has many car-sized boulders in it. Some are surrounded by ditches in the sand, like little moats. Why? The sand is blown away from the ground as wind impacts the rocks. My colleague Mark Bishop has studied these in more detail (read more here) (HiRISE ESP_037201_2450, NASA/JPL/Univ. of Arizona)
ENCORE Hi ho, hi ho … it’s out with work we go! As you relax this holiday weekend, step into our labor-atory and imagine a world with no work allowed. Soft robots help us with tasks at home and at the office, while driverless cars allow us to catch ZZZZs in the front seat.
Plus, the Internet of Everything interconnects all your devices, from your toaster to your roaster to … you. So there’s no need to ever get off the couch. But is a machine-ruled world a true utopia?
And, the invention that got us into our 24/7 rat race: Edison’s electric light.Guests:
- Barry Trimmer – Professor of biology, neuroscience, and biomedical engineering at Tufts University, and editor-in-chief, Soft Robotics
- Red Whittaker – Roboticist at Carnegie Mellon University
- Ernest Freeberg – Historian, University of Tennessee, and author of The Age of Edison: Electric Light and the Invention of Modern America
- Rob Chandhok – Computer scientist, president of Qualcomm Interactive Platforms
- Andre Bormanis – Television writer, producer, screenwriter and science advisor to Star Trek and Cosmos
First released August 26, 2013.
A piece of Mars: This scene (3.9×2.5 km or 2.4×1.6 mi) shows a surface carved by two different winds: one blowing from the right and one blowing from the bottom right. They’ve formed overlapping sets of streamlined rocks called yardangs. Can you tell which set of yardangs was formed first? It’s a little more complicated than it may first appear. (HiRISE ESP_037156_1800 NASA/JPL/Univ. of Arizona)
ENCORE We’ve all hit the snooze button when the alarm goes off, but why do we crave sleep in the first place? We explore the evolutionary origins of sleep … the study of narcolepsy in dogs … and could novel drugs and technologies cut down on our need for those zzzzs.
Plus, ditch your dream journal: a brain scanner may let you record – and play back – your dreams.
And, branch out with the latest development in artificial light: bioluminescent trees. How gene tinkering may make your houseplants both grow and glow.Guests:
- Emmanuel Mignot – Professor of psychiatry and behavioral sciences, and director of the Stanford Center for Sleep Sciences and Medicine, Stanford University
- Kyle Taylor – Molecular biologist at Glowing Plant
- Jerry Siegel – Neuroscientist and professor of psychiatry, the University of California, Los Angeles
- Jack Gallant – Professor of psychology and neuroscience, University of California, Berkeley
First released May 27, 2013.
A piece of Mars: The two shadowed hills in the upper part of this frame (497×373 m or 1631×1224 ft across) rest on a flat plain covered in large ripples. On the plain the ripples are aligned north-south, formed perpendicular to a wind blowing from the east (right). But those hills block the wind and turn it, so that the ripples between the hills change direction. This is how windblown landforms can be used as wind vanes in remote places (like on Mars). (HiRISE ESP_037188_1835, NASA/JPL/Univ. of Arizona)
You think your life is fast-paced, but have you ever seen a bacterium swim across your countertop? You’d be surprised how fast they can move.
Find out why modeling the swirl of hurricanes takes a roomful of mathematicians and supercomputers, and how galaxies can move away from us faster than the speed of light.
Also, what happens when we try to stop the dance of atoms, cooling things down to the rock bottom temperature known as absolute zero.
And why your watch doesn’t keep the same time when you’re in a jet as when you’re at the airport. It’s all due to the fact that motion is relative, says Al Einstein.Guests:
- William Phillips – Nobel Prize-winning physicist at Joint Quantum Institute, a partnership between the National Institute of Standards and Technology and the University of Maryland.
- Bob Berman – Astronomy writer and author of Zoom: How Everything Moves: From Atoms and Galaxies to Blizzards and Bees
- Michael Smith – Meteorologist, senior vice president of AccuWeather Enterprise Solutions, and author of Warnings: The True Story of How Science Tamed the Weather
A piece of Mars: Dunes outside the crater are straight but the ones inside the crater look like a spiderweb. Why? This image shows just how much the topography of a crater wall can affect the wind, which produces a much more complex set of dunes inside than out on the plains. (HiRISE ESP_037195_1625 NASA/JPL/Univ. of Arizona)
ENCORE Maybe goodbye isn’t forever. Get ready to mingle with mammoths and gaze upon a ground sloth. Scientists want to give some animals a round-trip ticket back from oblivion. Learn how we might go from scraps of extinct DNA to creating live previously-extinct animals, and the man who claims it’s his mission to repopulate the skies with passenger pigeons.
But even if we have the tools to bring vanished animals back, should we?
Plus, the extinction of our own species: are we engineering the end of humans via our technology?Guests:
- Beth Shapiro – Associate professor of ecology and evolutionary biology, University of California, Santa Cruz
- Ben Novak – Biologist, Revive and Restore project at the Long Now Foundation, visiting biologist at the University of California, Santa Cruz
- Hank Greely – Lawyer working in bioethics, director of the Stanford Center for Law and the Biosciences at Stanford University
- Melanie Challenger – Poet, writer, author of On Extinction: How We Became Estranged from Nature
- Nick Bostrom – Director of the Future of Humanity Institute, Oxford University
First released April 29, 2013.
These two papers by J.T. Wright’s group were posted today on astro-ph
The Ĝ Infrared Search for Extraterrestrial Civilizations with Large Energy Supplies. I. Background and Justification
J. T. Wright, B. Mullan, S. Sigurðsson, M. S. Povich
The Ĝ Infrared Search for Extraterrestrial Civilizations with Large Energy Supplies. II. Framework, Strategy, and First Result
J. T. Wright, R. Griffith, S. Sigurðsson, M. S. Povich, B. Mullan
Based on the analysis of WISE and Spitzer data, the authors concluded that “Kardashev Type III civilizations (a civilization that extracts fusion energy, information, and raw-materials from multiple solar systems) are very rare in the local universe”.
I remind you that we had a SETI hangout on this topic with this group, including as well Jill Tarter and Freeman Dyson in September 2013.
I look forward to reading about the search for Kardashev Type II civilizations from the same set of data.
A piece of Mars: What on Mars is this (the scene is 600×450 m, or 0.37×0.28 mi)? It can be hard to tell. The lines are ridges of windblown dunes or ripples, the dark gray stuff is active sand blowing between the dunes, and the underlying bedrock is pale tan. But if your eyes can’t make sense of it all, just sit back and enjoy the pretty patterns of Mars. (HiRISE ESP_037161_1785, NASA/JPL/Univ. of Arizona)
Who’s watching you? Could be anyone, really. Social media sites, webcams, CCTV cameras and smartphones have made keeping tabs on you as easy as tapping “refresh” on a tablet. And who knows what your cell phone records are telling the NSA?
Surveillance technology has privacy on the run, as we navigate between big data benefits and Big Brother intrusion.
Find out why wearing Google Glass could make everything you see the property of its creator, and which Orwellian technologies are with us today. But just how worried should we be? A cyber security expert weighs in.
Also, the benefits of an eye in the sky. A startup company claims that their suite of microsatellites will help protect Earth’s fragile environment.
And Gary catches a cat burglar!Guests:
- Robert Gehl – Professor in the Department of Communication, University of Utah. His article, “A Mind Meld with the Surveillance State” appeared in an online issue of The Week.
- Hal Rappaport – Technology consultant for businesses, author of the paranormal thriller Hath No Fury: The Lesson of Three Book One. His article, “7 Sinister Technologies from Orwell’s 1984", appeared on the SyFy Channel’s online magazine.
- Susan Landau – Professor of cyber security policy at Worcester Polytechnic Institute, author of Surveillance or Security?: The Risks Posed by New Wiretapping Technologies and Privacy on the Line: The Politics of Wiretapping and Encryption.
- William Marshall – Physicist, Planet Labs