Remember when Tupac made an appearance at last year's Coachella festival? It wasn't really Tupac but a holograph of the late rapper.

The holograph wasn't like watching a regular 3D TV image. You didn't need glasses, it was viewable to the entire audience, no matter what angle they were watching at, and it wasn't just a projected two dimensional image. It looked like Tupac was really on stage.

The engineers of the Object-Based Media Group at the MIT Media Lab, led by V. Michael Bove Jr. and his graduate student Dan Smalley, are working on technology that might enable that experience in your living room. The group is aiming to make true holographic videos not only a reality, but an affordable reality.

Sure, there have been other types of glasses-free 3D screens and devices, including the Nintendo 3DS handheld gaming system or various 3D TVs shown by Vizio and Toshiba, but those have suffered from poor viewing angles, causing the image to be distorted when you move off the right or left. They also aren't considered true holograms.

About This Podcast

After two weeks of traveling, Arnie is back in town to recount his adventures on this week's podcast. His first trip was to Canada to testify about the Pickering Nuclear Plant on Lake Ontario. His second trip was to southern California to speak at the conference "Fukushima Daiichi Accident: Lessons for California" alongside former Japanese Prime Minister Naoto Kan, former NRC Chairman Gregory Jaczko, and former NRC Commissioner Peter Bradford. While Arnie was in California, we received the news that the San Onofre Nuclear Plant near San Diego was closing permanently. So, what happens at San Onofre now?

Comment: Listen in, and find out.

After a string of high-profile cases, a new agreement between scientists and the people who fund them aims to usher in a new era of 'research purity'

Britain's leading science institutions will be told on Monday that they will be stripped of many millions of pounds in research grants if they employ rogue researchers who fake the results of experiments, The Independent has learnt.

The clampdown comes as retractions of scientific claims by medical journals are on course to top 500 for the first time in 2013 - having been just 20 a year in the late 1990s, when Andrew Wakefield notoriously claimed that the MMR vaccine caused autism in children. In April, the UK's first researcher was jailed for falsifying data over a prolonged period.

The Government is concerned that Britain's prized second place in global research behind the US will be at threatened if more fact-fabricators are exposed. It knows that hundreds of thousands of jobs could easily go to foreign rivals if British laboratories do not keep coming up with new product ideas, to be made by major multinational companies in UK factories.

All of the country's 133 universites and colleges of higher education are being forced to sign a new Concordat for Research Integrity - having been warned by major fund providers that those who do not will be refused access to more than £10 billion in research grants funded each year by British taxpayers - and as much again from the private sector.

A spokesman for Universities UK, which chaired negotations with the grant providers, said: "From next year, universities in the UK will have to prove compliance with the research integrity concordat in order to receive research grant. They are doing this to help demonstrate to government, business, international partners and the wider public that they can continue to have confidence in the research."

Retractions of medical claims alone in 2013 - logged by the Retraction Watch blog - are certain to be more than 400, and could easily top 500. Some result from genuine mistakes, several plagiarise other scientists' work, breakthroughs that haven't been checked. But as many as one in 10 of them contain lies.

Mission control has instructed the crewmembers of the International Space Station (ISS) to open the hatches of the recently docked ATV-4 unmanned cargo spaceship and carry out disinfection procedures, over fears of mold and bacteria contamination.

The ATV-4 (the fourth Automated Transfer Vehicle) was launched from the Kourou space center in French Guyana on June 5, and docked with Russia's Zvezda ISS module on Saturday.

The hatch opening was initially planned for Monday, but was delayed. According to NASA TV, the delay was over a possible "mold and bacteria contamination" on three bags inside the cargo ship.

"The level of contamination poses no risk to the crew members, however, teams want to make sure the problem is taken care of in order to protect the atmosphere aboard the space station," website Spaceflight101 reported before the opening of the hatch.

As Uranus speeds in its orbit in the solar system, there are three large space rocks that are in lockstep with the gas giant, according to new simulations. Two of them are wobbling in unstable "horseshoe" orbits near Uranus, while the third is in a more reliable Trojan orbit that is always 60 degrees in front of the planet.

The largest of this small group is the asteroid Crantor, which is 44 miles (70 kilometers) wide. Its horseshoe orbit, and that of companion 2010 EU65, means the space rocks seesaw between being close to Uranus and further away. They should stay in that configuration for a few million years.

The last of the group is 2011 QF99, in a Trojan orbit near one of Uranus' Lagrangian points - sort of like a celestial parking spot where an object can hang out without undue influence from the balanced gravitational forces.

High-altitude winds on neighboring Venus have long been known to be quite speedy, whipping sulfuric-acid-laden clouds around the superheated planet at speeds well over 300 km/h (180 mph). And after over six years collecting data from orbit, ESA's Venus Express has found that the winds there are steadily getting faster... and scientists really don't know why.

By tracking the movements of distinct features in Venus' cloud tops at an altitude of 70 km (43 miles) over a period of six years - which is 10 of Venus' years - scientists have been able to monitor patterns in long-term global wind speeds.

What two separate studies have found is a rising trend in high-altitude wind speeds in a broad swath south of Venus' equator, from around 300 km/h when Venus Express first entered orbit in 2006 to 400 km/h (250 mph) in 2012. That's nearly double the wind speeds found in a category 4 hurricane here on Earth!

NASA announced Tuesday a Grand Challenge focused on finding all asteroid threats to human populations and knowing what to do about them. The challenge, which was announced at an asteroid initiative industry and partner day at NASA Headquarters in Washington, is a large-scale effort that will use multi-disciplinary collaborations and a variety of partnerships with other government agencies, international partners, industry, academia, and citizen scientists. It complements NASA's recently announced mission to redirect an asteroid and send humans to study it.

"NASA already is working to find asteroids that might be a threat to our planet, and while we have found 95 percent of the large asteroids near the Earth's orbit, we need to find all those that might be a threat to Earth," said NASA Deputy Administrator Lori Garver. "This Grand Challenge is focused on detecting and characterizing asteroids and learning how to deal with potential threats. We will also harness public engagement, open innovation and citizen science to help solve this global problem."

Grand Challenges are ambitious goals on a national or global scale that capture the imagination and demand advances in innovation and breakthroughs in science and technology. They are an important element of President Obama's Strategy for American Innovation.

New York - By 2045, humans will achieve digital immortality by uploading their minds to computers - or at least that's what some futurists believe. This notion formed the basis for the Global Futures 2045 International Congress, a futuristic conference held here June 14-15.

The conference, which is the brainchild of Russian multimillionaire Dmitry Itskov, fell somewhere between hardcore science and science fiction. It featured a diverse cast of speakers, from scientific luminaries like Ray Kurzweil, Peter Diamandis and Marvin Minsky, to Swamis and other spiritual leaders.

In the year 2045

Kurzweil - an inventor, futurist and now director of engineering at Google - predicts that by 2045, technology will have surpassed human brainpower to create a kind of superintelligence - an event known as the singularity. Other scientists have said that robots will overtake humans by 2100.

According to Moore's law, computing power doubles approximately every two years. Several technologies are undergoing similar exponential advances, from genetic sequencing to 3D printing, Kurzweil told conference attendees. He illustrated the point with a series of graphs showing the inexorable upward climb of various technologies.

By 2045, "based on conservative estimates of the amount of computation you need to functionally simulate a human brain, we'll be able to expand the scope of our intelligence a billion-fold," Kurzweil said.

Itskov and other so-called "transhumanists" interpret this impending singularity as digital immortality. Specifically, they believe that in a few decades, humans will be able to upload their minds to a computer, transcending the need for a biological body. The idea sounds like sci-fi, and it is - at least for now. The reality, however, is that neural engineering is making significant strides toward modeling the brain and developing technologies to restore or replace some of its biological functions.

Discovery Date: May 8, 2013

Magnitude: 18.2 mag

Discoverer: Robert H. McNaught (Siding Spring)

The orbital elements are published on M.P.E.C. 2013-K38.

Google launches giant balloons over New Zealand's south Island, carrying computer equipment that can create a high-speed internet infrastructure. Codenamed 'project loon', the helium filled balloons carry antennae, computers, batteries and navigational equipment, collecting power from solar panels that dangle below. Each can provide internet coverage over an area of 1200 square kilometres. The project intends to help remote areas across the world access internet coverage