Reuters / Lucas Jackson Bitcoin fell more than 10% on Thursday as cryptocurrency traders whose prices have risen 20% this month are holding on. The digital token reached a record high of 20,000 this week. Traders said that after such a quick rally, many large investors had booked profits on …

The Ethiopian prime minister said on Thursday that the army had been ordered to move to the hometown of Tigre’s regional capital after a 727-hour ultimatum to surrender to Tigre leaders, and warned half a million city dwellers to stay indoors and remain unarmed. After three weeks of fighting, the …

At the risk of pouring gasoline on a coronavirus fire, millions of Americans flocked to the skies and highways ahead of Thanksgiving, ignoring the fact that they stay home and limit holiday gatherings to members of their own household. Those who flew witnessed the 2020 landscape at the country’s airports: …

A man wearing a face mask waits for a train at the Central Train Station during the COVID-19 epidemic in the Swedish capital, Stockholm, on November 3, 2020. Wei Zhuichao | Xinhua News Agency | Getty Images LONDON – A global study of more than 12,000 coronavirus mutations has found …

Visualization of quantum dots in bilayer graphene using scanning tunneling microscopy and spectroscopy showed three times symmetry. In this three-dimensional image, the peaks represent sites of high amplitude in a wave of trapped electrons. Credit: Zehao G, Frederick Juken and Jero Velasco Jr. Researchers used a scanning tunneling microscope to …