Gaurav Khanna

University of Massachusetts Dartmouth

Articles by: Gaurav Khanna

For oversized, spinning black holes, the singularity that a spacecraft would have to contend with would be very gentle.

Spinning Black Holes Could Open Up Gentle Portals for Hypersonic Spacecraft

By Gaurav Khanna published

Feel like visiting another star system or dimension? You can do this by traveling through a spacetime portal of a black hole. But you better choose carefully. All black holes are not created equal.

Dr. Who's TARDIS time machine

Time Travel Is Possible — But Only If You Have an Object With Infinite Mass

By Gaurav Khanna published

Who wouldn't want to travel in time, glimpsing the dinosaurs or peeking at humans 2,000 years from now? Now physicists have designed a time machine that seems deceptively simple.