"Imagine two black holes that have lived a long life... at the end of their lives, they're going around each other. As…"

"Empty space itself has energy. In every little cubic centimeter of space, whether or not there's stuff, whether or no…"

"We, [of course], have to ask, "Could [the] end lead to a new beginning?" And there are ideas, whereby what actually i…"

"How's it all gonna end?"

"What does the future look like?"

"The universe has just begun"

"What we do now, and in the next few years, will profoundly affect the next few thousand years. David Attenborough"

"Nothing stays the same on this planet. Things are not still! Craig Childs"

"The fate of the Sun is the same as for all stars. One day, they must all eventually die. Brian Cox"

"The universe will end not with a bang, but with a whimper. And not in fire, but in ice. Neil deGrasse Tyson"