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Science/nature/environment

What's that all about then?

(35 Posts)
Lilygran Wed 28-Nov-12 12:34:53

Attenborough's retrospective programme the other day was a lot about evolution. He referred to the fact that in the biochemical soup of the Yellowstone geysers (shot of murky bubbling pool) there are unicellular organisms which are similar to the ones that started it all off. Is there evidence that these organisms are in a process of evolving? And why are so many of the creatures and plants farther back in the evolutionary tree still around? Why is one tree shrew still a tree shrew and another evolved? And the coelacanth? Really want to know!

Nanadog Wed 28-Nov-12 12:29:22

I have stong suspicions that my sister is from another planet, in another universe.

absentgrana Wed 28-Nov-12 11:26:39

I think physicists say that the question what came before the Big Bang has no meaning because there isn't a before the Big Bang. I know – it's hard to get the head round. confused

Bags Wed 28-Nov-12 11:13:46

That's what physicists are trying to work out, flick. Meanwhile, the answer is "dunno". I'm happy with that.

vampirequeen Wed 28-Nov-12 09:47:13

Depends if you believe in God. If you do then God was there and if you don't then nothing was there. I don't know how the Big Bang happened.

FlicketyB Wed 28-Nov-12 09:43:49

What came before the Big Bang?

Bags Wed 28-Nov-12 08:55:41

Should have added a [cold-blooded-mathematical-approach emoticon]

Bags Wed 28-Nov-12 08:55:04

We know very little about the universe. I came across some probability talk ages ago (sorry, can't remember where) which said that the universe is SO HUGE that there is a high probability of there being life elsewhere in it. But it is also SO HUGE that there are innumerable places where the existence of life is not at all likely (low to zero probability). So far we've only come across those places. But we haven't been able to look very far yet. We're only apes with limited brain power and limited technology, so that isn't even the teeniest bit surprising.

Anne58 Tue 27-Nov-12 22:45:50

But don't foget we only know limited stuff about our own galaxy, there could well be other entire galaxies out there that we are just not aware of.

Although, I would agree that if we haven't found them yet, or they us, for that matter then the likelihood does somewhat diminish.

Grannyknot Tue 27-Nov-12 22:42:14

I was thinking about this the other night after watching a programme on the planets and the solar system - the wonder of it all, which got me thinking about the universe and the following: what explains the fact that - to the best of my knowledge - no one has ever found the slightest bit of evidence, not even a glimmer of life as we know it, or anything even approaching life, therefore there doesn't appear to be anything like us (or any other living thing) anywhere else in the universe, except on this planet of ours. What I'm trying to say in a very clumsy way is - why only here? (I know about the perfect circumstances that existed on this planet eons ago that ignited the spark, so my question isn't about that). My question is - is it really only us here on Planet Earth (yes I think so) and if so - what's that all about?