- Yahoo!
- 20/7/3 20:00
Thousands of years ago, the first inhabitants of the Americas journeyed deep into caves to mine red ochre, a highly valued clay earth...
Thousands of years ago, the first inhabitants of the Americas journeyed deep into caves to mine red ochre, a highly valued clay earth...
Test monkeys infected with the novel coronavirus responsible for the COVID-19 pandemic were protected from reinfection for up to 28 days later, a Chinese study out Thursday in the journal Science said. While the monkeys displayed initial immunity, it's unclear how long such immunity will last in humans - it will be necessary to wait months, or even years, to know if the millions of people...