The first U.S. president, George Washington, was inaugurated in New York City.
Students are learning yoga exercises and meditation skills.
The very first born and oldest surviving gorilla in captivity has died.
More than 40 representatives have said they will not attend the inauguration.
The new $100 gold coin features an African-American woman as the face of Lady Liberty.
The future of heart surgery may look different if we can regrow heart muscle.
Researchers say part of a very large shelf of ice on Antarctica could soon break off – and become an iceberg.
President Barack Obama leaves the economy to Donald Trump in much better shape than when he took office in 2009.
Rex Tillerson said China should be barred from the islands it has built in the South China Sea.
Minerals are important elements for keeping the human body healthy.