The head of NASA's New Horizons mission tells us how precise their itinerary has been in sending a space probe billions of miles into space.

Flying from Pluto to Ultimatulae, which took three and a5 years at 32,000 miles an hour, about a million miles almost every day,

we ended up arriving at Ultimatooli only 23 seconds off the predicted time.

Interplanetary influences are at work on some of the gnarliest tides around the world.

I thought the Bay of Fundy had the largest tide in the world, but it turns out that there is one other place

and it is on Gava Bay.

London is one of the truly great cities on Earth.

They know how to calm its urban atmosphere by doing a great job with their gardens

and parks.

47% of London's area is green space and we have 3,000 gardens.

High tides, far out travels, and the Gardens of London.

It's all just ahead on travel with Rick Steve's.

Come along.

We're exploring the farthest destination mankind has ever photographed on today's travel with Rick

Steve's. In just a bit, the head of NASA's New Horizons mission tells us about its close-ups

of Pluto, and now more than a billion miles beyond as it continues

into the edges of our solar system.

And later in the hour, we'll get down to Earth with advice for enjoying the best of London's lovely gardens and botanical parks.

Living where the salt water hits the land like I do, you grow up with the tide.

Tides in, tides out, let's go climbing. Tides slack, we can get our boat

through the narrows. There's a lot more to tides than that, and marine conservationist Jonathan

White has spent decades studying the tide.

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