Paraphrasing Brian Cox, English physicist and professor of particle physics at the University of Manchester:

The Earth is one planet orbiting one star among 400 billion stars in a single galaxy, itself just one of 2 trillion galaxies in a small patch of the universe.

We are collections of atoms—some as old as time itself, others forged in stars and cooked over billions of years—arranged in patterns capable of thought. Remarkably, it is a reasonable guess that there are no other worlds in our galaxy where this has happened. If this is true, it means that our planet is the only place where complex biology exists, the only place where anything thinks, and the only place where meaning exists within our galaxy.

Paradoxically, while we are physically insignificant, this planet could be considered the most valuable place in the local universe. If we were to destroy ourselves—through deliberate action or inaction—we would be responsible for erasing meaning in a galaxy of 400 billion suns, potentially forever.

We bear an immense responsibility to preserve meaning in this galaxy. To safeguard the rare and fragile gift of thought, to protect the only known haven for consciousness, is to honor the improbability of our existence. In a cosmos vast beyond comprehension, this tiny world may be the only voice capable of telling its story; we must make it endure.

See Brian Cox making this point himself:

See full video here,
and a deeper conversation about why
it’s possible we’re the only island of meaning in our galaxy