Such information is needed before humans can safely travel to Mars and beyond in the next century.

Have you been traveling in the thirteenth century?

Her accounts opened the door for independent women to travel in the twentieth century.

This latter variant travelled to western Europe in the 11th century, and became the rebec.

The invention of the safety bike brought about a change in the way people traveled in the late 19th century.

The French artist traveled to the Middle East in the late 19th century.

Both have traveled together in the 20th century.

He travelled to Persia and Arabia in the 12th century.

Following a time-honoured tradition, many northern artists travelled to Italy in the 17th century.

The pair of rock formations served as a landmark along the trails for many pioneers traveling west in the 19th century.