Details—and a free Calexico download—here.

• NASA/JPL/University of Arizona

A new batch of photos from the HiRISE camera have been posted online. These shots are from the HiWish suggestions made by members of the public.

HiRISE team member Shane Byrne tells us about this shot of the Martian north pole:

Sometimes icy layers can be ablated away during warm climates. Later the ice sheet can be buried by new ice layers and grow in size again; it's likely that many of these cycles have occurred over the ice sheet's history.

The Martian north polar layered deposits are an ice sheet much like the Greenland ice sheet on the Earth. Just as with the ice sheet in Greenland, this Martian ice sheet contains

Glenn Lyons, executive director of the Downtown Tucson Partnership, is on his way out of town.

The release from DTA:

Glenn Lyons will be leaving his position as CEO of the Downtown Tucson Partnership in May to lead a similar public-private group in Des Moines, Iowa.

Lyons has accepted a position as President and CEO of the Downtown Community Alliance, an economic and community development organization. The group recruited Lyons based on the strength of his work on behalf of the Downtown Tucson Partnership, a non-profit group that

City Councilman Rodney Glassman rehearsed for his upcoming Senate campaign on Arizona Illustrated last night. You can watch his segment with Bill Buckmaster after the jump.

Look for him to announce his plans to seek McCain's seat next week.

Tom DeMoss is among the artists who are displaying their work during the exhibit of "Beyond the Lens" at the Tubac Center of the Arts. The exhibit is on display through April 25. There is an opening reception tomorrow, Thursday, April 1 from 5 to 7 p.m.

Just Press Play: Calexico performs at the Backyard, Austin, Texas, on May 5, 2004

You know where you want to be this Saturday, April 3: Festival en el Barrio Viejo! Calexico is headlining the all-day music festival in the streets of downtown's Barrio Viejo to benefit KXCI. The show will include Sergio Mendoza y La Orkesta, Crawdaddy-O, Tom Walbank, Naim Amor, Salvador Duran, Fourkiller Flats, Silver Thread Trio and other special friends. Details here.

Whet your appetite for the show with our latest release from the Secret Files of Jim Blackwood, the KXCI morning DJ and KUAT-KUAZ engineer extraordinaire. As we mentioned a few weeks back, Blackwood has posted a select number of live performances by the likes of Calexico, Giant Sand, and Al Perry at archive.org, where you'll find all sorts of obscure and cool digital artifacts.

One of them is this 2005 show from The Backyard in Austin, where Calexico performed along Ozomatli and Los Lonely Boys. It's s tight set that includes "Jesus and Tequila," "El Picador," "Not Even Stevie Nicks," "Crystal Frontier" and an epic "Guero Canelo."

Calexico's Joey Burns:

I remember the early day in May 2005 as being very warm and sunny as we pulled up to the beautiful location of the Backyard Music Venue outside of Austin TX. The place was surrounded by trees and plenty of natural space, surprising for a rock venue. The Backyard was

Jon Stewart weighs in on the McCain-Palin reunion tour that visited Pima County last week.

• Photo by Michael Malinski

"Woman with Crown of Flowers," ca. 2006-2008, acrylic on canvas, by David Tineo, is among the works in ¡Viva David Tineo!, at the Tucson Museum of Art, 140 N. Main Ave. From the collection of Donna Al-Ghurab, Tucson, Ariz.

Twenty-five years ago in the Tucson Weekly:

While Tineo sees himself as a teacher, he also sees himself as a life-long student.

"There is so much I don't know yet. Right now I am getting to a point where there's not much more I can show the kids here."

He is contemplating basic educational courses at Pima and plans to eventually get an advanced degree in art education at the University of Arizona so he can teach. Course work all depends on time and money available. "I wasn't born into a rich family," he says with a short laugh.

He also wants to "go back" and learn the art of mural painting from the master muralists of Mexico. The history and tradition of mural painters goes back to the Aztec and Mayan Indians and Tineo feels it is imperative to study the art in Mexico.

"I am at the point where I have to go back, go with some instructor over there … that really has kept up with the traditional methods of mural painting. I need to capture more of that technique and take it with me, apply that knowledge here with my creativity, to organize better mural projects in the United States. That's what we need now," he says.

TW arts editor Margaret Regan shares the disturbing news that crooks have hit the Conrad Wilde Gallery.

"This is horrible news for a very nice small gallery," Regan writes. "Conrad Wilde just moved to their new location at Sixth and Sixth in the New Year. They're right next door to Lulubell, which got robbed a couple of weeks ago."

Here's Regan's most recent review of a show at the gallery.

Conrad Wilde Gallery was robbed by unknown person(s) between the dates of 3/27-3/29. The major loss was 13 original works of art by 10 artists as well as all of the gallery's electronic equipment. This is a locally owned small business that is well regarded in service to the community. The loss of these artworks is devastating to the gallery and to the individual artists whose works were taken.

A reward is offered to anyone with information leading to the safe return of these artworks. Phone 520-820-6410. No questions will be asked.

Please circulate this message widely to anyone/everyone you know in the Tucson area. We apologize in advance for multiple posts.

Many thanks,
Conrad Wilde Gallery

The Large Hadron Collider is up and running. Details here.

Mari Jensen of the UA College of Science gives us the local angle:

Now the research begins for the team of University of Arizona physicists who
built pieces of the largest scientific instrument ever, the Large Hadron
Collider.

At 4:06 a.m. Tucson time, two beams of protons smashed together inside the
Large Hadron Collider at 7 trillion electron volts, or TeV — more than
three times the energy previously achieved in a particle accelerator.

Today's collisions mark the start of a decades-long research program.
Experiments conducted using the LHC will provide fundamental discoveries
about the matter that makes up our universe.

Shortly after 4:15 a.m. Tucson time, UA-LHC team member Walter Lampl wrote
in an e-mail from Switzerland, "The first collisions arrived only a