NASA has selected the four astronauts that will travel to the Moon during the upcoming Artemis 2 mission, which will be humanity’s first crewed return to the Moon in more than 50 years.The four astronauts are: Reid Wiseman, Victor Glover, and Christina Koch of NASA, and Jeremy Hansen of the Canadian Space Agency.“The Artemis 2 crew represents thousands of people working tirelessly to bring us to the stars,” said NASA Administrator Bill Nelson before announcing the crew during a live event ...read more
The seeming existence of an “arrow of time” is one of the greatest unsolved mysteries of modern physics, so the short answer to the question is “we have no idea.” But sometimes, the journey is more fun than the destination.We remember our pasts, but our futures are unknown to us. Causes always lead to effects, and not the other way around. You can do some things with ease, like break an egg or burn a book, but you can’t do the reverse.Arrow of TimeThis phenomenon is called the “arrow ...read more
The Tyrannosaurus is typically depicted with its fearsome fangs on full display. But a paper published in Science states that the theropod dinosaurs, such as Tyrannosaurus rex, actually had thin, lizard-like lips that hid their sharp, serrated teeth.Tyrannosaurus rex bellowing with its mouth shut, like a vocalising alligator. With its mouth closed, all of the enormous teeth of T. rex would be invisible behind its lips. (Credit: Mark Witton)Theropod TeethThe paleontologists and paleoartists who ...read more
Did your mother ever say, "you should eat your greens"? Well, she was right; you should definitely eat your greens — and you should make sure she's eating hers, too.In recent years a growing body of evidence has shown that diet can play an important role in staving off Alzheimer's disease and other dementias. Now scientists are starting to work out the details of what such a diet looks like.You've probably been hearing about the Mediterranean diet for years, based on its known benefits for h ...read more
The recently launched James Webb Space Telescope (JWST) is set to help rewrite our understanding of the cosmos. Already, astronomers have looked further back into the early universe than ever before — and crucial to the telescope capturing light from over 13 billion years ago are its massive mirrors.The primary mirror, with its iconic hexagonal shape, is more than two stories in diameter and consists of 18 separate segments. All of these segments must be perfectly smooth, flat and scratch-free ...read more
Author Vishay SinghPosted on Categories Discover Magazine
