The smooth “flow” of time is an illusion, that “The events of the world do not form an orderly queue like the English, they crowd around chaotically like the Italians,” says Carlo Rovelli, an Italian theoretical physicist who wants to make the uninitiated grasp the excitement of his field. The concept of time, he says, “has lost layers one after another, piece by piece”. We are left with “an empty windswept landscape almost devoid of all trace of temporality … a world stripped to its essence, glittering with an arid and troubling beauty”.
"Our Milky Way is more than 13 billion years old, so it is not young anymore, but the galaxy still has both a central bulge of old stars and spiral arms of young stars," said Matthew Colless from Australia National University.
"When most of us think of DNA, we think of the double helix," says Associate Professor Daniel Christ (Head, Antibody Therapeutics Lab, Garvan) who co-led the research. "This new research reminds us that totally different DNA structures exist - and could well be important for our cells."
“They have evidence that hominids in Africa had already been impacting the size distribution of mammals on that continent before Homo sapiens evolved,” says paleoecologist Emily Lindsey, assistant curator and excavation site director of the La Brea Tar Pits Museum in Los Angeles, who was not involved in the study. What that means, she says, is “these groups of hominid species were having impacts on a continental scale before the evolution of modern humans.”
"The Weird Existence of Primordial Black Holes in the Early Universe" --Harvard-Smithsonian Center for Astrophysics
Astronomers studying the motions of galaxies and the character of the cosmic microwave background radiation came to realize in the last century that most of the matter in the universe was not visible. About 84 percent of the matter in the cosmos is dark matter, much of it located in halos around galaxies. It was dubbed dark matter because it does not emit light, but it is also mysterious: it is not composed of atoms or their usual constituents like electrons and protons.
"Flashback" --Carl Sagan on How We Would Communicate With Advanced Alien Life (Weekend Feature/Video)
If life exists elsewhere in the Universe, would we be able to communicate with it? In this clip from the 1977 Royal Institution Christmas Lecture, "The Planets", Carl Sagan demonstrates how we could send a signal that would make sense to intelligent beings that have evolved independently from us.
"I think it's fascinating to see just how extraordinary this population is, to think that they're almost like superhumans living among us with these really extraordinary capabilities. But I also think natural selection is a lot more powerful than we sometimes give it credit for, and maybe we should be looking for it in more places than we thought."
Today's Top Space Headline --"It's About Expanding Earth! Over the Next 10 Years, Space Will Become an Industrial Zone Filled with Orbiting Factories"
"Over the next 10 years, space will become an industrial zone filled with orbiting factories. Like oil platforms on the ocean, but not polluting,” says entrepreneur Jason Dunn, Made In Space’s co-founder and chief technology officer. "We could have structures in space so big, they could be the backbone of huge internet telecommunications antenna,” Dunn says. “Or a giant space station colony, or giant arrays of solar panels. Or we could send robots to the surface of the moon, or Mars, and use resources there to build habitats.”
"Cave art was part of the package deal in terms of how homo sapiens came to have this very high-level cognitive processing," says Miyagawa, a professor of linguistics and the Kochi-Manjiro Professor of Japanese Language and Culture at MIT. "You have this very concrete cognitive process that converts an acoustic signal into some mental representation and externalizes it as a visual."