Science, Nature and Tech

Real Life Minecraft – Cactus

Part of our series on the features in Minecraft. If you are a Minecraft player, then you know that Cactus blocks grow naturally in deserts and mesas. The blocks can be harvested, but will destroy any items that come in contact with them. But what are REAL cacti like (and why do we sometimes say “cactus” and other times say “cacti”? Sarah takes a closer look.

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Science, Nature and Tech

Rock, Paper, Scissors… Robot???

rock paper scissors robot

The game rock-paper-scissors is well known around the world. We’ve all used it as a choosing method, or simply as a game! The easiest version is played between two people. Both players choose one of the three shapes for one of their hands, and reveal their choice at the same time, hoping their choice beats their opponent.
It’s nearly impossible to gain an advantage over your opponent, unless you wait long enough to identify their choice before you make yours, but the chances are that they will realise your cunning plan and call you a cheater!
This game is not simply a choosing game. There are mathematicians dedicated to constructing algorithms for the best strategy to win, and scientists devoted to creating unbeatable robots! In fact, researchers at the University of Tokyo have created a rock paper scissors robot that wins at rock-paper-scissors 100% of the time.

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Science, Nature and Tech

LETS Swap!

Pokemon cards, Moshi monsters, jelly stickers, friendship bracelets – at some point over the last few years my kids have swapped all these things. And in return they get good stuff back.

Wouldn’t it be great if you could go into a shop and, even if you had no money, you could still swap something you had for something you want?

In communities all over the world, people are doing just that. Or something very like it.

Local Exchange Trading Schemes or LETS for short, enable people who live near each other to swap their skills and receive goods and services without having to pay a penny.

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