BIOLOGY - EVOLUTION



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Evolutionary Science

Human Evolution

Evolutionary Science


6/18/17

Is this a ray of hope for evolution deniers?

Organism discovered that hasn't evolved in 2 billion years

Nah. Just another ... in a long line of neverending defeats.


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5/26/17

And the discoveries of science just keep getting weirder and weirder

Evolution ... in reverse


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5/18/17

After "The Great Dying" (252 million years ago)
life may have recovered sooner than we thought.




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5/9/17

The evolution of multicellularity

How utterly embarrassing for humans:
even single cells figured it out (working together) ...

but we can't


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Remember the recent discovery of a new form of life at Mono Lake in California?
(A discovery that scientists have not embraced)

Well this would make a better candidate.




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Scientists may have discovered ... The God Gene



Okay, they didn't actually call it that ... but they could have


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11/20/16

Bird's wings are the result of an evolutionary reversal ...

from dinosaur arms


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11/18/16

The evolutionary arms race doesn't just exist between species.
It also exists inside ...

each of us


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10/25/16

How epigenetic memory is passed across generations

"Epigenetic modifications do not affect the DNA sequence of genes,
but change how the DNA is packaged and how genes are expressed.
"


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10/19/16

How fast can evolution happen in multicellular creatures?

Pretty damn fast

I think the lights will be burning deep into the night at ...
The Discovery Institute


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Earth's earliest animals




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So ... in addition to being indebted to green algae for giving us plants

We also owe sex to green algae

There are some debts ... that we will just never be able to repay


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An extreme example of "punctuated equilibrium"




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About 252 million years ago ...

the Earth's greatest extinction event occurred

We almost didn't survive that one


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Since Richard Lenski shattered the Creationist's world a few years ago
when he demonstrated evolution occurring in the lab,
what has his lab been up to lately?

Well ... he's doing it again.

Evolution Is As Complicated As 1-2-3


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As some recent studies have suggested,
it has now been proven that ...

DNA is not responsible for ALL inherited traits


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The fear of certain smells is passed on by mice to their offspring

Maybe science shouldn't have been so harsh to Lamarck

Lamarckism

But before passing judgment, it might be wise to weigh this opinion from

Richard Dawkins

It looks like this debate is far from over


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This is the new candidate for "First Known Animal"



UPDATE

More recent research indicates that the sponge preceded the jelly


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How, and when, did birds get their wings?




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Need a reply to those pesky Creationists
who argue that evolution promotes only vicious competition?

Tell them to stay current on the latest research ...
to avoid further embarrassment



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Not all mutations may be random after all.

Uh oh ... big changes are a comin'

If they change the definition of "human" ... I wonder if I will still qualify?


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One of the worst days in Earth's history

The day the dinosaurs got hit

But out of that tragedy, there arose survivors (our ancestors)
who would benefit from the dinosaur's demise, and change the world forever.


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Fascinating discovery of what makes dogs so different from wolves

Genetically similar ... but behavorally different


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Fire ants come in two varieties ... defined by their DNA

Fire Ant evolution


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Those who claim that viruses are not part of the Tree of Life
take a huge hit from science.

Tree of Life Continues To Be Refined


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Human Evolution


6/8/17

The evolutionary beginning of modern humans
"may be" much earlier than we thought ...

over 300,000 years ago


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How did Tibetans evolve the ability to survive at low-oxygen elevations?

Their ancestors "partied" with a different species of human


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Carl Woese, a scientist few have ever heard of, is to biology ...
what Einstein is to physics.
The 16SrRNA gene led Woese to the discovery of our ancestors ...

the Archaea

"I didn't come from no monkey !"

That's right Bubbles ... the truth is far worse than that


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With each new discovery, human origins get more complicated ...

but better defined



Family tree of the four groups of early humans
living in Eurasia 50,000 years ago
and the gene flow between the groups due to interbreeding.
(The tree is easier to understand if you read it upwards from the root)


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Genetically speaking, Neandertals were our brothers and sisters (53:07)

Yes we mated with them, so in a sense,
all non-African modern humans are the product of incest.

Look on the bright side ... it's no worse than the biblical version.


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Worldwide analysis of the Y-chromosome
yields a date range for the last common human male ancestor.

and it is remarkably close to the estimated range
for the last common human female ancestor


No. This doesn't mean Adam and Eve were real.


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The date for the emergence of modern humans
has been pushed back from 200,000 to 338,000 years,
as molecular biology fills in the gaps in the fossil record.



The x-chromosome (female) is the large one;
the y-chromosome (male) is the small one.


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In the quest to unravel ancient human history, scientists examine ...

300,000-400,000 year-old DNA


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New discovery turns human history on its head

But I think calling Homo Erectus "the first global human species"
is stretching the meaning of the word "global"
considering they missed the entire Western hemisphere.


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