A theory of everything won't provide all the answers

"Dark matter and dark energy – these are not crazy ingredients we're adding"

We shouldn't be obsessed with finding a theory of everything, says Lisa Randall, one of the world's most prominent theoretical physicists

Doesn't every physicist dream of one neat theory of everything?
There are lots of physicists! I don't think about a theory of everything when I do my research. And even if we knew the ultimate underlying theory, how are you going to explain the fact that we're sitting here? Solving string theory won't tell us how humanity was born.

Cloud of atoms goes beyond absolute zero

Nothing is colder than absolute zero, so it seems nonsensical to talk about negative temperature – but now there is a substance that must have just that. The revelation could shake up our ideas about temperature and help us understand strange entities such as dark energy, as well as the interactions of subatomic particles.