Scientists have offered new insights into the origin of diamonds in a group of stony meteorites called ureilites. These diamonds most likely formed by rapid shock transformation from graphite during one or more major impacts into the ureilite parent asteroid in the early solar system. Previously, researchers have proposed that diamonds in ureilites formed like those on Earth -- deep in the mantle of the planet, where the high pressures needed to form a diamond, are created by the weight of the overlying rock.
Slow Streets Become Spooky (Safe) Streets for Halloween By Eillie Anzilotti Halloween festivities on Minnesota Slow Street in 2020 This Halloween season, Slow Streets are becoming Spooky Streets. All across San Francisco, community groups are transforming their local Slow Streets into neighborhood gathering places for trick-or-treating, costume parties and more. On October 31 from 3 to 6 p.m., organizers from Kid Safe SF and the Great Highway Park Initiative are turning the Great Highway into The Great Hauntway , a beachside block party with a costume contest, arts and crafts and a “spooky disco.” That same day, neighbors in Sunnyside are gathering on Slow Hearst Street for a Halloween party at 4 p.m. On Minnesota Street, the Dogpatch Neighborhood Association is hosting their second annual MinneSLOWta Spooky Slow Street Stroll on October 30—the same day that Slow Sanchez Street will host a Halloween Stroll . Safe, car-light spaces for people to walk, bike and roll are essen...
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