A half-century ago, the war in Vietnam was escalating, the space race was in full swing, the Rolling Stones were on a world tour, the bravery of those who marched to Selma led to the passage of the Voting Rights Act, and the St. Louis Arch was completed.
Recent images from across southeast Alaska, a narrow strip of coastal islands and mountains that stretches more than 500 miles along the Pacific Ocean.
Participants at the Wave and Goth festival in Germany, attendees at a “Kiss-a-thon” in Mexico City, observations of Ramadan in Indonesia, and so much more.
Throughout the 20th century, NASA made extensive use of wind tunnels to test and refine designs for airplanes, spacecraft, and many other vehicles and structures.
The ongoing eruption of Kilauea volcano has opened as many as 20 new fissures on Hawaii's Big Island over the past two weeks.