Monday, September 30, 2019
The Zipf Mystery
Friday, September 27, 2019
50 REAL Differences Between Men & Women
Thursday, September 26, 2019
Monday, September 23, 2019
Thursday, September 19, 2019
Which Way Is Down?
Fwd: Asteroids and earth life
Asteroid dust may have triggered massive explosion of life on Earth 466 million years ago
Nearly half a billion years ago, there was a huge explosion of species development on Earth, causing the biodiversity of animals to increase dramatically -- but the true cause of that event has remained a mystery.
In a new paper published on Wednesday in Science Advances, scientists show that the event's onset coincided with the largest documented asteroid breakup in the asteroid belt over the past two billion years.
That breakup, which was triggered by a collision with another asteroid or comet, would have spread enormous amounts of dust throughout the solar system.
"The blocking effect of this dust could have partly stopped sunlight from reaching the Earth – leading to cooler temperatures," the study's co-author Birger Schmitz, a professor of nuclear physics at Lund University, writes in The Conversation. "We know that this involved the climate changing from being more or less homogeneous to becoming divided into climate zones – from Arctic conditions at the poles to tropical conditions at the equator. The high diversity among invertebrates, including green algae, primitive fish, cephalopods and corals, came as an adaptation to the new climate."
Schmitz and his colleagues also studied the distribution of very fine-grained, extremely tiny dust in the sediment, determining its extraterrestrial origin by discovering helium and other substances inside the sediments.
"Our results clearly show that enormous amounts of fine-grained dust reached Earth shortly after the breakup," writes Schmitz.
Tuesday, September 17, 2019
M&M's - Wikipedia
During World War II, the candies were exclusively sold to the military
Monday, September 16, 2019