In the summer of 2022, when the James Webb Space Telescope relayed its first batch of images from the depths of space, it revealed something unexpected: The early universe was full of massive, bright galaxies — teeming with an astonishing numbers of stars — long before anything like them should have existed. At that early stage of cosmic evolution, less than a billion years after the Big Bang, researchers argued, these stars simply shouldn’t have had time to get so big. As Jorryt Matthee, ...read more
Stars like the Sun are remarkably constant. They vary in brightness by only 0.1% over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep the Sun shining steadily for about 5 billion more years, but when stars exhaust their nuclear fuel, their deaths can lead to pyrotechnics.The Sun will eventually die by growing large and then condensing into a type of star called a white dwarf. But stars more than eight times more massive than the Sun die vi ...read more
When you hear the words “reptilian” or “cold-blooded”, the first thing that comes to might be a miserly politician or an uncaring boss — in other words, probably not an actual crocodile or lizard. That’s because for decades, reptiles have been characterized as cold, unfeeling, and even primitive creatures. But scientists agree that reptiles aren’t emotionless — they’re misunderstood. Extensive research has shown that reptiles experience a wide range of emotions, and that the ...read more
In 2022, we reported the DNA sequences of 33 medieval people buried in a Jewish cemetery in Germany. Not long after we made the data publicly available, people started comparing their own DNA with that of the 14th-century German Jews, finding many “matches.” These medieval individuals had DNA fragments shared with thousands of people who have uploaded their DNA sequence to an online database, the same way you share DNA fragments with your relatives.But what type of a relationship with a medi ...read more
Deep in the rainforests and eucalyptus woodlands of Australia and New Guinea lives an enigmatic creature known as the striped possum. Quiet, cute, and nocturnal, its favorite activity is boring holes into the trees and using its elongated fingers to extract ants and termites from the trunks within. While the striped possum is hard to spot in the wilds of Australia, it’s much more common in the lowlands of New Guinea. The Striped Possum: A Curious CreatureThe striped possum is less than a foot ...read more
Author Vishay SinghPosted on Categories Discover Magazine