Lifeboat Foundation

For all the fuss it caused, it is only about a foot high.

The “door” was imaged by NASA’s Curiosity rover on May 7 on the slopes of Mount Sharp, the central massif within Gale crater, where it landed in 2012. Described on one website as a “pharaonic tomb door” because of its resemblance to some ancient Egyptian remains, it is, in fact, only about one foot high.

It is hard to spot on the panoramic image mosaic of the hillside above, but it leaps out at the eye if you see the individual frame where it occurs, as seen below. It does look like a doorway until you realize how small it is. And if you boost the contrast in the dark parts of the image, the picture just about reveals a solid rock face at the back of the shadowed interior. So as a gateway into the hollow hills of Mars, it doesn’t lead very far.

Continue reading “‘Door’ on Mars? A planetary scientist explains what you really see” »

Ars Technica’s Chris Lee has spent a good portion of his adult life playing with lasers, so he’s a big fan of photon-based quantum computing. Even as various forms of physical hardware like superconducting wires and trapped ions made progress, it was possible to find him gushing about an optical quantum computer put together by a Canadian startup called Xanadu. But, in the year since Xanadu described its hardware, companies using that other technology continued to make progress by cutting down error rates, exploring new technologies, and upping the qubit count.

But the advantage of optical quantum computing didn’t go away, and now Xanadu is back with a reminder that it still hasn’t gone away. Thanks to some tweaks to the design it described a year ago, Xanadu is now able to sometimes perform operations with more than 200 qubits. And it has shown that simulating the behavior of just one of those operations on a supercomputer would take 9,000 years, while its optical quantum computer can do them in just a few-dozen milliseconds.

This is an entirely contrived benchmark: Just as Google’s quantum computer did, the quantum computer is just being itself while the supercomputer is trying to simulate it. The news here is more about the potential of Xanadu’s hardware to scale.

Aqueous droplet formation by liquid-liquid phase separation (or coacervation) in macromolecules is a hot topic in life sciences research. Of these various macromolecules that form droplets, DNA is quite interesting because it is predictable and programmable, which are qualities useful in nanotechnology. Recently, the programmability of DNA was used to construct and regulate DNA droplets formed by coacervation of sequence designed DNAs.

A group of scientists at Tokyo University of Technology (Tokyo Tech) led by Prof. Masahiro Takinoue has developed a computational DNA droplet with the ability to recognize specific combinations of chemically synthesized microRNAs (miRNAs) that act as biomarkers of tumors. Using these miRNAs as molecular input, the droplets can give a DNA logic computing output through physical DNA droplet phase separation. Prof. Takinoue explains the need for such studies, “The applications of DNA droplets have been reported in cell-inspired microcompartments. Even though biological systems regulate their functions by combining biosensing with molecular logical computation, no literature is available on integration of DNA droplet with molecular computing.” Their findings were published in Advanced Functional Materials.

Developing this DNA droplet required a series of experiments. First, they designed three types of Y-shaped DNA nanostructures called Y-motifs A, B, and C with 3 sticky ends to make A, B, and C DNA droplets. Typically, similar droplets band together automatically while to join dissimilar droplets a special “linker” molecule is required. So, they used linker molecules to join the A droplet with the B and C droplets; these linker molecules were called AB and AC linkers, respectively.

Both Macron and Madonna have expressed concerns about genetic privacy. As DNA collection and sequencing becomes increasingly commonplace, what may seem paranoid may instead be prescient.

GPS might rely on satellites to function on Earth, but its use in space is a little trickier.

NASA is preparing to test a new lunar navigation system that will connect to the Earth’s Global Navigation Satellite System (GNSS) from the moon, a report from the space agency explains.

The unprecedented mission will break a record for the most distant connection to GPS at roughly 238,000 miles from Earth’s surface. It will be delivered to the moon for testing by Firefly Aerospace’s Blue Ghost lander no earlier than 2024, NASA says.

In Shark Bay off the west coast of Australia, scientists have discovered what they believe to be the largest plant on Earth.

A team of astronomers in Japan, for the first time, discovered a faint radio emission covering a giant galaxy as a result of achieving high imaging dynamic range. Radio emission is emitted by the gas created directly by the central black hole.

Using the same technique to additional quasars, the team hopes to learn more about how a black hole interacts with its host galaxy.

Using the Atacama Large Millimeter/submillimeter Array in Chile (ALMA), astronomers targeted the quasar 3C 273, which lies at 2.4 billion light-years from Earth. It is the first quasar ever discovered, the brightest, and the best studied. However, much less has been known about its host galaxy itself because combining the faint and diffuse galaxy with the 3C273 nucleus required such high dynamic ranges to detect.

CBC Radio.

Bob McDonald’s blog: The movie’s fictional Darkstar aircraft is based on historical innovations in hypersonic flight.

Dear SRI Friends and Supporters.

You are warmly invited to follow **Aldo Spadoni, President and Chairman of the Board of Trustees of the International Association of Astronomical Artists (IAAA),** next Monday June 6th, 19:00 UTC, discussing the role of art in space exploration and humanity expansion into outer space.

Continue reading “Exploring the Role of Art in Advancing Space Exploration” »