Posted on Aug 7, 2020
It’s been said that if a machine ever gains awareness, it will be not due to our careful programming, but to an unforeseeable anomaly. Perhaps the first anomaly occurred back in the distant primordial fog of human evolution. We may never know. But a new analysis of ancient genomes suggests that different branches of the human family tree interbred multiple times, and that some humans carry DNA from an archaic, unknown ancestor.
Posted on Aug 7, 2020
“If we’re going to send people to Mars, we better understand what’s going on in the atmosphere,” said Zachariah Milby, a researcher at the Laboratory for Atmospheric and Space Physics (LASP) at University of Colorado, Boulder. about the eerie nightly phenomenon on Mars –first discovered by the European Space Agency’s Mars Express Mission in 2003–when the sun sets and temperatures fall to minus 80 degrees Fahrenheit and below, that spreads across much of the planet’s sky –“a soft glow created by chemical reactions occurring tens of miles above the surface.”
Posted on Aug 6, 2020
Ever since NASA’s Voyager 1 spacecraft flew past Jupiter in March, 1979, scientists have wondered about the origin of Jupiter’s lightning, which had been theorized for centuries. Now, new results from NASA’s Juno mission, which has been orbiting Jupiter since July 4, 2016, suggest our solar system’s largest planet–an immense spinning colorful sphere of methane and ammonia so large it could easily swallow all the other planets– is home to what’s called “shallow lightning” and slushy hailstones Juno’s science team calls “mushballs” that capture ammonia and water in the upper atmosphere and carry them into the dark depths of Jupiter’s atmosphere.
Posted on Aug 5, 2020
“In the deepest sense, the search for extraterrestrial intelligence is a search for ourselves,” said Carl Sagan. Although as yet unfulfilled, the quest continues from the Kepler Mission to Tess and now via the ten 25-meter radio antenna dishes of the continent-wide Very Long Baseline Array (VLBA). Astronomers have announced the discovery of a Saturn-sized planet closely orbiting a small, cool star 35 light-years from Earth using the VLBA’s supersharp radio “vision”.
Posted on Aug 4, 2020
The detection of the “Higgs” in 2012 -described by Caltech physicist Sean Carroll as “the particle at the end of the universe” –was the physics equivalent of the discovery of DNA. Higgs bosons have the capacity to share space because they are more like a force than a thing in the way we normally think of “things” or “particles”. It’s a vibration in the Higgs field, just as a photon of light is a vibration in the electromagnetic field. Bosons are entities that have effects; they carry the forces (strong, weak, gravitational or electromagnetic) described by the Standard Model in physics, making them what physicists call force-carrying particles.
Posted on Aug 4, 2020
“Black holes are the seductive dragons of the universe,” wrote science-fiction author Robert Coover, “outwardly quiescent yet violent at the heart, uncanny, hostile, primeval, emitting a negative radiance that draws all toward them, gobbling up all who come too close…these strange galactic monsters, for whom creation is destruction, death life, chaos order.”
Posted on Aug 3, 2020
“Mars once was wet and fertile. It’s now bone dry,” said Cosmos host, Neil deGrasse Tyson, “Something bad happened on Mars. I want to know what happened on Mars so that we may prevent it from happening here on Earth.”
Posted on Aug 3, 2020
