Why people tend to believe UFOs are extraterrestrial

Most of us still call them UFOs—unidentified flying objects. NASA recently adopted the term "unidentified anomalous phenomena," or UAP. Either way, every few years popular claims resurface that these things are not of our ...

Why archaeologists usually rebury their excavations

Hadrian's Wall in Northern England is a popular tourist spot for those interested in British history. Visitors this year will get the chance to see the Roman bathhouse at Birdoswald before it is reburied by archaeologists.

page 4 from 28