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On Mars, the wind wins

Cosmic Diary by Lori Fenton - January 26, 2015

A piece of Mars: This scene (600×450 m or 1969×1476 ft) is covered in small craters, formed by the splash of a larger crater nearby. They cover everything, even the bright ripples visible on the right. So the ripples were there before the impact that formed all these little craters. And yet… there are itsy little gray ripples on the upper right, merging with the crater rims – these are new ripples, younger than the craters. On Mars, it’s the wind that wins in the end. (HiRISE ESP_039057_1485, NASA/JPL/Univ. of Arizona)

Skeptic Check: Mummy Dearest

ENCORE  Shh …mummy’s the word! We don’t want to provoke the curse of King Tut. Except that there are many curses associated with this fossilized pharaoh – from evil spirits to alien malevolence. So it’s hard to know which one we’d face.

We’ll unravel secrets about the famous young pharaoh, including the bizarre events that transpired after the discovery of his tomb in the Valley of the Kings, and learn what modern imaging reveals about life 3,000 years ago.

Plus, we dispel myths about how to make a mummy, while learning the origin of that notorious mummy curse. Also, discover why superstitions have survival value.

Guests:

•   Jo Marchant – Author of The Shadow King: The Bizarre Afterlife of King Tut’s Mummy

•   Andrew Wade – Physical anthropologist, McMaster University, Hamilton, Ontario

•   Salim Ikram – Professor of Egyptology, American University, Cairo

•   Stuart Vyse – Professor of psychology, Connecticut College, New London, Connecticut, author of Believing in Magic: The Psychology of Superstition

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•   F. DeWolfe Miller – Professor of Epidemiology at the University of Hawaii at Manoa

 

First released June 24, 2013.

Wind eroded mantle

Cosmic Diary by Lori Fenton - January 21, 2015

A piece of Mars: The curving ridge of a mountain has signs of many small landslides. Mantled on top of these is an older set of landslides that has been partially eroded away. The rippled edge of this older deposit suggests that it is wind that has done the erosion. So the history here goes: mountains, then landslides, then wind erosion, then new smaller landslides. (HiRISE ESP_039195_1755 NASA/JPL/Univ. of Arizona)

Big Questions Somewhat Answered

Here are questions that give a cosmologist – and maybe even you – insomnia: What happened after the Big Bang? What is dark matter? Will dark energy tear the universe apart?

Let us help you catch those zzzzs. We’re going to provide answers to the biggest cosmic puzzlers of our time. Somewhat. Each question is the focus of new experiments that are either underway or in the queue.

Hear the latest results in the search for gravitational waves that would be evidence for cosmic inflation, as well as the hunt for dark matter and dark energy. And because these questions are bigger than big, we’ve enlisted cosmologist Sean Carroll as our guide to what these experiments might reveal and what it all means.

Guests:

•   Sean Carroll – Cosmologist, California Institute of Technology

•   Jamie Bock – Experimental cosmologist at the California Institute of Technology and NASA’s Jet Propulsion Laboratory and a member of the BICEP team

•   Brendan Crill – Cosmologist at NASA’s Jet Propulsion Laboratory and member of the Planck collaboration

•   Jeff Filippini – Post-doctoral Fellow, California Institute of Technology, assistant professor of physics at the University of Illinois and member of the Spider team

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•   Neil Gehrels – Astrophysicist at NASA’s Goddard Space Flight Center, project scientist for WFIRST

Bearded craters and dunes

Cosmic Diary by Lori Fenton - January 12, 2015


A piece of Mars: This 600×450 m (1969×1476 ft) scene has a complex sedimentary history. How are bearded craters and dunes formed? They weren’t always bearded. At some point, a deposit of bright material accumulated on this surface, and was then eroded so that all that remains of it is what is protected by topography (anything that pokes up like dunes or crater rims). Can you find the boulder that has tumbled downslope (it too has a beard!). (HiRISE ESP_038826_1700, NASA/JPL/Univ. of Arizona)

How to Talk to Aliens

"Dear E.T. …” So far, so good. But now what? Writing is never easy, but what if your task was to craft a message to aliens living elsewhere in the universe, and your prose would represent all humankind? Got writer’s block yet?

What to say to the aliens was the focus of a recent conference in which participants shifted their attentions away from listening for extraterrestrial signals to transmitting some. In this show, we report on the “Communicating Across the Cosmos” conference held at the SETI Institute in December 2014.

Find out what scientists think we should say. Also, how archeology could help us craft messages to an unfamiliar culture. Plus, why journalists might be well-suited to writing the message. And, a response to Stephen Hawking’s warning that attempting to contact aliens is too dangerous.

Guests:

•   Douglas Vakoch – Director of interstellar message composition, SETI Institute

•   Paul Wason – Archaeologist, anthropologist and vice president for the life sciences and genetics program at the Templeton Foundation

•   Al Harrison – Emeritus professor of psychology, University of California, Davis

•   Morris Jones – Journalist and space analyst in Sydney, Australia

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•   Shari Wells-Jensen – Professor of English, Bowling Green State University

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