The Delta variant of the SARS-CoV-2 virus is responsible for most cases of coronavirus infections worldwide, scientists say. The COVID-19 vaccines work well against the variant so far. Fully vaccinated people who get infected rarely require hospital...
Investigators are trying to find out if the driver of a vehicle that crashed into a parade in the state of Wisconsin was fleeing a crime. The incident happened Sunday during a Christmas holiday parade in Waukesha, near the city of Milwaukee. Five peo...
Two of 17 Hostages Held in Haiti Released Two members of a U.S.-based religious group who were taken hostage last month in Haiti have been released. 上个月在海地被劫持为人质的两名传教士已经获释。这两名传教士是一个总部位...
The American space agency NASA is preparing to launch a spacecraft that will attempt to strike an asteroid to see how the crash affects the space object's path. 美国宇航局正准备发射一颗试图撞击小行星的航天器,以了解撞击会如...
Scientists Do Rare Study on Early Human Development Scientists have been able to do a rare study into an important, early stage of human development. They studied an embryo in its third week after fertilization a moment in time that has previously be...
A recent study has followed the origins, or beginnings, of the family of languages that include modern Japanese, Korean, Turkish and Mongolian. The findings show a shared genetic ancestry for the hundreds of millions of people who speak what the rese...
Ivory Coast Battles to Save Forests Destroyed by Cocoa Farming The Ivory Coast is the world's top cocoa-growing country. Cocoa grows as seeds on a tropical tree called the cacao. Cocoa is the main element used in making chocolate. The Ivorian governm...
There is new hope for the future of a population of endangered butterflies in the American state of California. Last year, a count of the orange-and-black Western monarchs reached a record low of about 1,900. But this year, butterfly counters are rep...
American and European officials sharply criticized Russia's recent missile test that exploded an orbiting satellite into many pieces. Scientists said this orbiting debris will increase risks to humans and their efforts in space for years to come. 美国...
Schools in the United States are using a large increase in federal money to help students' mental health needs. School systems, or districts, are given plenty of freedom on how to spend the federal money. But mental health problems among students had...