Amazing facts


While you listen

oCoder Education - English listening Audios are suitable for learners with different levels of English. Here are some ways to make them easier (if you have a lower level of English) or more difficult (if you have a higher level of English).
You can choose one or two of these suggestions – you don't have to follow all of them!

Making it easier

Read all the exercises before you listen to the audio.
Look up the words in the exercises that you don't know or don't understand in a dictionary.
Play the audio as many times as you need.
Play each part of the audio separately.
Answer all questions in the exercise.
Read the transcript after you have listened to the audio.

Making it harder

Listen to the audio before you read the exercises.
Only play the audio once before answering the questions.
Play the whole audio without a break.
Don't read the transcript.
Now, listen to the audio and do the exercises on the following tabs.
If you do not complete all the question, you can play the audio again. After that, read the dialog to make sure that you understand all word in the audio.
Only about one tenth of the cells in your body are ...
really you.
Bacteria are mostly ...
really helpful.
bad for humans.
neither good nor bad.
Animals need bacteria to ...
fight diseases.
provide energy.
digest food.
You have ... cells in your body.
7 million
7 trillion
7 octillian
Most of the atoms are ...
tiny cubes.
not used.
empty space.
You probably have mites in your ...
Mites are very small creatures that are about ...
3 millimetres long.
a third of a millimetre long.
0.03 millimetres long.
Mites eat ...
dead skin.
your eyelashes.
tiny insects.
A: Hey, I’m reading this really interesting article about the human body.
B: Yeah? Well, we know all about that from biology lessons.
A: No, we didn’t learn much at all at school! They’re discovering loads more things all the time. Really amazing things! Did you know that only about one tenth of the cells in your body are really you? The rest are bacteria.
B: What? I’m not really me?
A: No, of course you are you, but you also have millions, or trillions, of bacteria in you.
B: Eeeeuuugh!
A: No, they’re mostly really helpful. Someone did an experiment to see if animals can live without bacteria, and he found that a lot of them died or had to have a special diet. Animals need bacteria to digest food, you see. So we’re better off with bacteria.
B: Unless the bacteria are bad.
A: Unless they are bad, but they’re nearly all good. Oh yeah, and going back to cells, do you know how many cells you have in your body?
B: Quite a lot, I’d say. A good few.
A: Yeah, but how many?
B: I don’t know. I’m not mathematical.
A: 7 octillion! That’s 7 plus 27 noughts.
B: I knew it was a lot.
A: OK, that’s an amazingly huge number, almost impossible to imagine. But the really weird thing is that most of the atoms are empty space, just air or nothingness. And if you took out the empty space, you could fit your body inside a tiny cube which measures one 500th of a centimetre on either side. That’s a box measuring  0.002 of a centimetre on each side. You’d be much too small to see.
B: Mmm, I can imagine that. It sounds like something that would happen in a really bad Hollywood movie. You know, a mad scientist goes:(funny voice) ‘I’m going to extract all the air from your body’. OK, enough facts for one day.
A: Don’t go! One last thing, did you know …
B: No.
A: Did you know that you probably have mites in your eyelashes?
B: Mites in my eyelashes? What are mites exactly anyway?
A: Yeah, they’re very small creatures, like insects, only not insects. They’re about a third of a millimetre long, so you can’t really see them. These particular mites live in eyelashes and eyebrows.
B: But in mine?
A: Well, maybe not. Only about 50% of people have them, and more older people. So you might not have any. Anyway, they’re completely harmless, they just eat dead skin.
B: Yeah, right, harmless. I really would have preferred not to know that.
A: Sorry.
B: I mean, really!