Scientists detected the gravitational waves after a pair of unusual black holes collided.
President Obama has arrived in Israel, just as new government is taking office there.
It’s the first foreign trip of his second term, but more importantly, it’s his first visit to Israel as president.
The White House has already said Obama will not be bringing with him any sort of new Middle East peace initiative.
So what is the purpose of his visit, given his rocky relationship with Israeli Prime Minister Benjamin Netanyahu?
What would you like to hear President Obama say during his Israel trip? Tell us on Facebook.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.