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What greenhouse gases would change if there were no humans?

What greenhouse gases would change if there were no humans? And how?

Karisma
auckland

5-14years

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Digital photos – do they tell the future and can you index them into a table of combinations?

With a digital camera you could take a photo of
pretty much anything, at any time, anywhere – on this
world or another, at this time, or in the future.

So, given that digital images have a width and height (pixels) and colour it means you could calculate every possible permutation of image and therefore see images that will ‘maybe’ show snap shots of the future, past or present.

1) How can this be if you can take ‘infinte’ number of different photos of something? Does that imply that nature repeats?

2) Say if you were able to create the images on a computer. How would you know the image was true / false?

3) If this were possible, could you translate an image back to a number which would be the index into a table of combinations?

3.1) would this index number be a form of data compression?

Darren,

England

25-34

Why can’t we see galaxies moving away from us?

How are galaxies speeding away from earth at 1 million meters per second? Why dont they look like they are moving that fast?

Asked by: Tiana

How many volts or amps would it take to kill an average person?

How many volts or amps would it take to kill an average person IF the current is confined to the brain alone?

Jazz

Why do we do science?

Why do we do science?
Vicky from Wiltshire (Aged 5-14)

Why do humans have such a curious mind?

Why do humans have such a curious mind?
Anna Butler from Somerset (Age 5-14)

Why is everything round like atoms, planets, electrons?

Why is everything round like atoms, planets, electrons, why not square so the join together better
Charlee Mayes from Edinburgh (Aged 5-14)