In 2006, NASA launched the New Horizons probe to explore the then ninth planet of the solar system, Pluto.
After traveling for nine years, New Horizons reached Pluto and became the first spacecraft to visit the far-flung world.
Today, the probe has crossed the mark of 50 Astronomical Units from Earth.
That's more than 7.5 billion km.
But data from the Pluto flyby is still being analyzed by astronomers, and now, new studies suggest that Pluto is alive and isn't as calm as it seems.
But how did astronomers reach this conclusion?
What was the strange thing they saw in the pictures sent by the New Horizons probe?
And most importantly, does this discovery hint at the possible existence of life on Pluto?
Pluto is an icy world with a heart of frozen nitrogen and carbon monoxide ices.
It was the first object ever discovered in the Kuiper belt and is still the largest known body in that region.
