Doctor Knowles and Professor McCork get to the bottom of life's questions. McCork and Knowles ask 'How long would it take to walk the Earth?'.
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-HOWLING AND MOANING
-Day five - I can barely remember
the last time I spoke to another human being.
Wow, Colin is really embracing this wilderness survival thing.
I'm so impressed. Confronting your fears is never an easy thing to do.
Out here in the wild, there could be snakes, mountain lions,
-flies, dogs, rabbits...
What was that?
Be brave, Jonathan. Be brave.
-Well, the show must go on.
We are going live, Professor.
Hey, wait for me!
ANNOUNCER: This is...
..the floor manager.
Come on, everybody!
-It's time for...
Today, we are asking...
Did you know that the Earth isn't perfectly round?
In fact, its circumference is around 67km less measured vertically,
going through the poles, than it is around the equator.
I always thought it was flat.
So tell us, Dr Knowles, how long would it take to walk around
this not-quite-round Earth of yours?
If we allow for eight hours' rest per day,
walk only in a straight line
and assume a constant speed of about 5km per hour,
it would take a person about 500 days to walk the distance of
the Earth's equator.
Hmm. But that doesn't take into account mountains,
deserts, oceans, jungles...
I'm not sure if it's possible to
accurately calculate this one, Professor.
Here's an idea.
Why don't we take a quick break while Dr Knowles figures out
a better way of answering the question? Heh!
Whatever is out there, whatever is making that noise,
it's planning to have me for dinner.
Ms Hucklebuck, can we stop doing this now?
My arms are really tired.
Yes, I think that just about covers frights and terrors in the wild.
You can stop now.
-Yes, nailed it.
Ooh! Positions, everyone!
So tell us, Dr Knowles, if there were
no mountains or barriers or anything, and if you never
needed to take a rest, how long would it take to walk the Earth?
Well, in this hypothetical situation,
and assuming a constant speed, it would take an average human
around 335 days to walk
the Earth's equator. Just under a year.
At the speed of a crawling baby,
it would take two years and four months.
But that seems fast compared to the giant tortoise,
which would take over 76 years to complete the journey.
Dr Knowles, I wonder what
the fastest way to go around the Earth would be.
Based on top speed alone, the fastest way to travel around
the Earth would be in a North American X-15 rocket plane
in just over five-and-a-half hours.
PLANE ENGINE ROARS
See you next time!
And we are clear.
OK, Colin. Training's over.
You can come out now.
Yes! Civilisation at last!
Well done, Jonathan.
You scored full marks
on wilderness survival training level one.
Oh, Colin, you are going to love level two -
a three-day hike to Monster Mountain.
I-I-I-I think I've reached my desired wilderness level for now,
thank you very much. B-B-Bye-bye.
Oh, dear, I hope we didn't scare him too much.
Maybe level two could just be camping in the back garden.
Or sleeping with the lights off.
Good idea. One step at a time.
Professor McCork and Doctor Knowles ask 'How long would it take to walk the Earth?'. Meanwhile, the normally fearful Colin embarks on a solo Wilderness Survival Challenge. Things could get very creepy...