North Carolina’s 1900 constitutional amendment imposed poll taxes and literacy tests while temporarily exempting many white voters through a grandfather clause. The United States state-level measure sharply reduced Black political…
In the 2023 SWITCH study, four people with severe paralysis used Synchron’s vein-delivered brain implant to control digital devices at home. The early trial reported no serious device-related adverse events…
A fossil acquired by London’s Natural History Museum in 1924 has been identified as Invictibellatrix amberina, a previously unknown megaraptoran dinosaur. Researchers used a CT scan to make a three-dimensional…
A University of Cambridge study used brain imaging and memory tasks to investigate how people preserve details of individual experiences while recognizing similarities between them. The findings add evidence about…
Researchers analyzing Roman concrete fragments from Privernum, Italy, found lime-rich inclusions that may help seal cracks when water enters the material. Laboratory tests support the idea that hot mixing with…
Researchers used machine learning to analyze lidar data from Campeche, Mexico, and identify the hidden Maya city of Valeriana, with 6,764 mapped structures. The results reveal a substantial urban settlement…
The 1966 Chicago Freedom Movement united local organizers and the SCLC to challenge housing discrimination and residential segregation. In the United States, its marches and negotiations exposed the limits of…
Redwire and University of California San Diego researchers used the BioFabrication Facility aboard the International Space Station to print a human meniscus tissue construct in microgravity. The demonstration can help…
Arkansas’s 1939 adoption of a majority-vote rule for Democratic primaries created runoffs when no candidate won more than half the vote. The reform changed campaign strategy in a state where…
