Humans are alone in universe

The renowned professor Brian Cox has dropped the bombshell
revelation that he does not believe in aliens. The popular scientist
54, has argued that the existence of aliens is "unlikely", explaining
that the chances of sophisticated life evolving like humans have
is "too low".
He said that he believes "there's probably nothing else", and that
we are the only civilisation in this galaxy.
Speaking to Noble Rot magazine, Cox said (https://bit.ly/3ibcN18):
“You can confine the argument to the galaxy, to the Milky Way,
because we’re never going to contact anything outside that and
nothing’s ever contacting us from different galaxies.
“But in a galaxy, there are 400 billion stars and more planets
than that... I think there are no civilisations out there.
“It took 3.8 billion years to go from the origin of life on the
planet to a civilisation, and that’s a long time. It’s a third of
the age of the universe.
“The universe has only been around for 13.8 billion years and, as
sun-like stars typically last for four or five billion years, there’s
a window of stability.
“So it takes four or five billion years to go from a single cell
to civilisation, and stars really don’t remain stable on timescales
much longer than that.
“The biologists I know think that it was such a freak occurrence
that anything got multicellular. There’s probably nothing else.
“I’ve got one friend who likes to say that all there will be out
there is slime at best.” He added: “What does it mean to live a
finite, fragile life in an infinite eternal universe? Well, meaning
is a property of life and intelligence.
“So I’d say that if we are the only civilisation in the Milky Way
now, then Earth is the only island of meaning in a sea of 400
billion stars.
“So that is either frightening or, well, at the same time gives you
a sense of our value.
“I would say the universe is meaningless without life.”
Asked in the past if believes alien life could exist Professor Cox
has not denied it but rather thinks that the chances of a hi-tech
civilisation emerging in our galaxy are very slim.
He has previously explained: “I tend to restrict myself to the
galaxy, as I do think it’s possible that at the moment that there
is just one civilisation in the Milky Way, and that’s us.”