Tech

Astronomers: A comet fragment, not an asteroid, killed off the dinosaurs

Harvard astronomers have a new theory about the origin of the comet that led to the extinction of the dinosaurs. Some 66 million years ago, a catastrophic event occurred that wiped out three-quarters of all plant and animal species on Earth, most notably taking down the dinosaurs. An errant asteroid from the asteroid belt has been […]

Tech

How to shut off a quasar

Enlarge / This quasar is over two billion light years away, yet is bright enough to outshine far closer galaxies. (credit: NASA/ESA) Active galaxies are some of the brightest objects in the Universe. These galaxies send out enormous jets of matter at near light speed, all powered by matter falling into the supermassive black hole […]

Tech

How the humble slime mold helped physicists map the cosmic web

Enlarge / A reconstruction of the cosmic web— a vast network of filamentary structures of matter spanning the universe—modeled on the growth patterns of slime mold. (credit: Joseph N. Burchett et al./AJL) There’s rarely time to write about every cool science-y story that comes our way. So this year, we’re once again running a special […]

Tech

It Is coming from in the World: First fast-radio-burst Origin ID’d

{Expand / The CHIME telescope also has shown adept at picking {} Radio Bursts. |} (charge: Andre Renard / / CHIME Collaboration) Now, scientists are saying they have solved a few of those questions that has been nagging them within recent years: what just generates the strange phenomena called rapid radio bursts (FRBs)? As their […]