NASA is exploring ways to use tractor beams in future robotic probe missions. The agency has recently awarded a team of engineers $100,000 to study three experimental techniques for trapping small particles with lasers.

Spacecraft flying by comets and asteroids or rovers landing on Mars could use the methods to continuously sample their target.

While such technology has been used in biological and surgical applications for years, there has been little work on using it for remote sensing in space, said Paul Stysley, a NASA engineer at Goddard Space Flight Center in Greenbelt, Maryland, who leads...

Watson keeps its cool in the heat of a Jeopardy match with Harvard and MIT students.

BOSTON — IBM’s Jeopardy-playing artificial brainiac came to Beantown. It saw the pinnacles of East Coast higher education. And it conquered.

On Monday, at the Harvard Business School in Boston, Big Blue’s Watson supercomputer took on a team from the prestigious B School and a second from the MIT Sloan School of Management. Harvard’s Jeopardy team held its own and briefly had the lead. The MIT team, not so much. And in the end, Watson took home the trophy, just as it did when playing two human Jeopardy champs on ...