Uncategorized
- Anthropology
How using sheepskin for legal papers may have prevented fraud
Removing fat is key to turning animal skin into parchment. With sheepskin, the process creates a writing surface easily marred by scratched-out words.
- Physics
Atomic clocks take a step toward redefining the second
Measurements of the clocks’ frequencies provide the most precise clock comparisons yet, with uncertainties less than a quadrillionth of a percent.
- Astronomy
A new black hole image reveals the behemoth’s magnetic fields
A new analysis of Event Horizon Telescope data from 2017 brings to light the magnetic fields twisted around the black hole at the core of galaxy M87.
