Department of Homeland Security officers arrested Mahmoud Khalil, a recent Columbia University graduate who helped lead campus protests against Israel’s assault in Gaza. Zolan Kanno-Youngs, a White House correspondent for The New York Times, explains how the detention of Mr. Khalil, a legal permanent resident, has sparked a growing battle over free speech in the United States.
Introduction to the Heliopause – NASA Science
This graphic shows the position of the Voyager 1
