Richard Wiseman's Blog, page 18

We all scream for ice cream!

Fab magician Pete Firman brought this lovely video to my attention….. great ice-cream based misdirection….

Answer to the Friday Puzzle….

On Friday I set this puzzle…..

Yesterday my friend and I started to walk down a road.  We began our walk at the same time, from the same point, and headed in the same direction. I walk at 5 km/h and my friend walks at 6 km/h. Throughout the walk a dog ran between the two of us again and again, with a constant speed of 10 km/h. How far did the dog travel in 1 hour?

If you have not tried to solve it, have a go now.  For everyone else the answer is after the break.

10km, because the dog’s speed is 10 km/h.  Did you solve it?

 

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

It’s the Friday Puzzle!

Please do NOT post your answer, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

Yesterday my friend and I started to walk down a road.  We began our walk at the same time, from the same point, and headed in the same direction. I walk at 5 km/h and my friend walks at 6 km/h. Throughout the walk a dog ran between the two of us again and again, with a constant speed of 10 km/h. How far did the dog travel in 1 hour?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

It’s time to take The Sleep Test

I have just made this 59 Seconds video about micro-sleep, and the signs of sleep deprivation.  Hope you enjoy it.

 

Can you explain the amazing ghost car?

Paul W sent me this lovely video featuring an amazing appearing car….. can you explain it?

Lovely light bulb illusion

Michael F sent me this really clever and new illusion …..

Answer to the Friday Puzzle….

On Friday I posted this puzzle…..

Imagine a mythical family in which each daughter has the same number of brothers as she has sisters. In addition, each son has twice as many sisters as he has brothers. How many sons and daughters are there in this mythical family..?

If you have not tried to solve it, have a go now.  For everyone else, the answer is after the break.

The mythical family has four daughters and three sons.  Did you solve it?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

It’s the Friday Puzzle

First, as I mentioned yesterday, we have just released the Night School Sleep music on iTunes.  This 30 minute piece is scientifically designed to help you fall asleep and can be downloaded here.

Second, today I am off to New York City to see the premiere of a new documentary about James Randi.  I have seen a rough cut and it looks jolly good.  You can see the trailer here. If you get a chance to see it, go watch.

Finally, here’s the puzzle.  Please do NOT post your answer, but do say if you think you have solved the puzzle and how long it took. Solution on Monday.

Imagine a mythical family in which each daughter has the same number of brothers as she has sisters. In addition, each son has twice as many sisters as he has brothers. How many sons and daughters are there in this mythical family..?

I have produced an ebook containing 101 of the previous Friday Puzzles! It is called PUZZLED and is available for the Kindle (UK here and USA here) and on the iBookstore (UK here in the USA here). You can try 101 of the puzzles for free here.

Can you spot the woman?

First, we have just released the Night School Sleep music on iTunes.  This 30 minute piece is scientifically designed to help you fall asleep and can be downloaded here.

Second, James F sent me this rather lovely illusion.  This ‘parrot’ is actually a female model posing for body painter Johannes Stötter. Can you spot her? If not, there are clues after the break.

 

The woman’s arm forms the head and beak, and her legs make up the wing and tail feathers.

Can you identify this mystery animal?

Paul C sent me this weird picture of a strange animal…..

Can you identify it? Answer after the break.