People of the planet Earth, ladies and gentlemen, boys and girls, have I got a deep question

for you.

What does deep space and deep water have in common?

When asking that question fills me with a tingle of excitement, and that's because I honestly

love anything and everything to do with space, from finding out the answers to age old

mysteries of the universe, to what new worlds we might find, which humanity might one day

even call home.

Space has famously been described as the final frontier, but the truth of the matter is

that the same could be said of the Earth's deep oceans.

Both are the last great unknowns, full of undiscovered secrets.

As a young kid, it was space that fascinated me the most, and I have to say it still does.

I always wanted to be an astronaut, and with every space shuttle launch I saw on TV, I'd

visualise my dream of one day visiting the International Space Station, and finally feeling

that incredible sense of weightlessness.

I also think that the idea that we humans, a species that shares 98.8% of our DNA with chimpanzees,

having the ability to send probes and people into outer space is quite literally out of

this world.

These mechanical probes can of course reach further than our biological bodies, but in many

ways they are an extension of humanity.

Emissaries venturing out into the black void of endless possibility.

NASA launched two such probes over 40 years ago, in 1977, Voyager 1 and Voyager 2.

They've long since passed all the planets of our own solar system and have now reached

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