Podcast by Mark & Amanda | Science and Ideas Podcast
17 October 2026
Amanda has had enough of cars that don’t stop at crossings. Her solution? Build a wall. This week on Brilliant or Bonkers, we look at The Great Wall of Zebra: a pedestrian crossing where barriers rise out of the road the moment the green man lights up, just like at a level crossing. The cars stop because they have to, and everyone gets across safely, whether they’re five years old or ninety-five.
But what happens to the driver who’s going a bit too fast? How do ambulances get through? Could you press the button just to hold up the traffic? And should the barriers be solid steel or big squishy pillows?
We pitch it, poke holes in it, and work out how to make money from it. Then the Judgement Giraffe decides: is The Great Wall of Zebra Brilliant, Bonkers, or Brilliantly Bonkers?
00:00
14:33
11 October 2026
What if your car could defend itself? This week on Brilliant or Bonkers we look at Arm-A-geddon. A car fitted with robot arms that reach out and stop anyone reversing into it. No more car park scrapes, no more mystery dents, and no more coming back to find a note under the wiper (or worse, no note at all).
And the arms don’t just block. They talk. Get a friendly wave when someone lets you into traffic, a thumbs up for good parking, and maybe a gesture or two for the driver who doesn’t indicate.
Can a robot arm really stop a reversing car? Who pays when your car pushes back? What happens when two Arm-A-geddon cars meet in the same car park? Rock, Paper, Scissors? And could this be the start of cars with real personalities?
We pitch it, poke holes in it, and work out how to make money from it. Then the Judgement Giraffe decides: is Arm-A-geddon Brilliant, Bonkers, or Brilliantly Bonkers?
00:00
17:39
05 October 2026
This week's idea comes from Maddie Moate (YouTube, BBC), who asked a very good question from behind a pram: why can't parents get a coffee without opening a door, waking the baby and steering a buggy through a crowded café? Cars get a drive-thru. Why not a walk-thru?
Amanda and Mark take the Pram-Thru for a spin: a side hatch at pram height, order from the pavement, coffee handed out, baby still asleep. Is it an invention or just a sign and a bit of common sense? Who builds it first? And does it also serve wheelchair users and anyone else with their hands full?
Mark, as ever, turns a hatch into a business, and the Judgement Giraffe rules on whether the Pram-Thru is Brilliant or Bonkers.
Got an idea for the show? Send it in. The Giraffe is waiting.
00:00
19:17
28 September 2026
The Tree Snatcher! Or, how Amanda invented a machine and Mark turned it into a shady business
This week Amanda pitches the Tree Snatcher: a machine that digs up a whole tree (roots, soil ball and all) keeps it watered and happy in transit, and replants it wherever you want. Why wait 40 years for a sapling when you can just move the tree you actually want? There's a micro version for house plants too.
We cover:
Why trees hate being moved, and why "watered and well in transit" is the easy bit
Instant shade, instant privacy, instant gardens for new-build estates
Mark's pivot: don't rent the machine, sell the shade. Councils, schools, hospitals and car parks paying per square metre of canopy, with the trees rescued for free from demolition sites
The moment the business names itself: Shady Business — we'll give you cover
You can use it to speed up windturbine installation!
Verdict from the Judgement Giraffe? Listen to find out
Got an invention for us? Send it in and the Giraffe will pass judgement.
00:00
22:17
11 September 2026
Summer 2026, and half the country's gardens are going brown under a hosepipe ban. This week Mark and Amanda pitch a fix: the Water Butler, a tiny autonomous robot that carries a watering can, fills itself from the tap or water butt, and delivers water plant-by-plant using an extendable arm. Technically it's not a hose, so technically you're in the clear.
On the Brilliant side: targeted watering uses a fraction of what a hose does, your rainwater butt finally gets used, and less mobile gardeners keep their borders alive. On the Bonkers side: nine litres a trip means forty trips at tortoise pace, there's a robot full of water and electronics rolling across a sloping lawn, and — inevitably — the dog.
Is out-engineering a hosepipe ban clever or cheating? Would the neighbours cheer or report you? And how would Mark make money from it? The Judgement Giraffe cranes its neck and delivers a verdict.
00:00
21:04
06 August 2026
What if you never had to set foot in a supermarket again — but still got to pick your own bananas? This week Mark unveils the Shoppy: a robot that rides in your car, deploys itself when you park, and does the whole shop while you sit back with a coffee. You watch through its camera on an app and approve the fruit and veg yourself, and it conveniently forgets the sweets aisle exists.
But here's the twist: maybe you don't own it. Maybe the supermarket does, and you just connect to one as you pull into the car park — which means the store still gets to tempt you with its offers. And when two robots reach for the last discounted chicken? They settle it, naturally, with rock paper scissors.
It looks like Wall-E... but with human hands. Amanda thinks that's deeply creepy. Mark's already working out how to make money from it. And the Judgement Giraffe — who can see over every slow walker but still can't get past them — has some feelings.
Brilliant, or bonkers? You decide.
00:00
22:21