The New Childrens Encyclopedia

260 Cameras are everywhere. Cell phones often include them, they are used in security systems, in space exploration, medical equ ...

THROUGH A LENS 261 The first CCTV (closed- circuit television) camera that was installed in the UK was in It was put in Guy’s H ...

262 Global village Technology is helping to bring our planet together. People on the other side of the world live up to 12,500 m ...

GLOBAL VILLAGE 263 ELECTRONIC MAIL Electronic mail (email) is a way of sending written messages between computers. Invented in 1 ...

264 HAVING FUN WITH VR In most VR systems, headsets or glasses project the image of the virtual world in front of the user’s eye ...

IS THIS REAL? 265 SPACE EXPLORATION The American space agency NASA used virtual reality to help with the design of a Mars rover ...

266 Robotics Robots are machines that can do the kind of jobs that people do but never get tired or bored. Some robots work in d ...

Industrial robots O
First used 1960s O

Cost Varies according to use Industrial robots such as those used in car assembly lines ...

Nanotechnology The word nanotechnology describes the development of devices on the scale of atoms. Scientists hope to use this n ...

NANOTECHNOLOGY 269 A WATERREPELLENT fabric is covered with a layer of nanoparticles. The water forms a near-perfect sphere as ...

THE HUMAN BODY Which organs are these? Find out on page 287 How fast do nerve impulses travel? Find out on page 281 At rest, a c ...

How many nerve cells are in a human brain? Find out on pages 280–281 How many bones are in an adult human skeleton? Find out on ...

272 Your bodySix billion human beings share planet Earth. Each is unique. We all share certain characteristics, however, notably ...

YOUR BODY 273 TAKE A LOOK: CELLS Every living thing begins life as a single cell. Your body is made up of millions of cells so s ...

274 Bones Your bones form a framework for your body called a skeleton. If you did not have a skeleton your body would flop all o ...

BONES 275 BONES AND JOINTS Bones are living tissue that contain blood vessels, nerves, and cells. They are strong, but light, an ...

276 Mighty muscles Muscles are tissues that move parts of the body by contracting, or getting shorter. You have around 650 skele ...

MIGHTY MUSCLES 277 The sternocleidomastoid bends your head forward. If just one side contracts, it makes the head turn or tilt. ...

THE HUMAN BODY WHAT BLOOD DOESBlood delivers oxygen, water, and nutrients to your body’s organs and takes away waste carbon diox ...

THE HUMAN BODY What goes into blood? Blood is made up of red blood cells, white blood cells, platelets, and plasma. Plasma is mo ...