A mask blocks the drops. It stops the virus from spreading.
Photo Credit: Centers for Disease Control and Prevention
In the Know
Where on Earth Is Portugal?
Lisbon is the largest city in Portugal. It is also … read more
In the Know
Similar but Different: Reptiles and Amphibians
Amphibians live part of their lives in water. Adults lay … read more
In the Know
Maria Telkes – Scientist known as the Sun Queen
Maria Telkes invented things that use solar energy. One thing … read more