Tag-Archive for » evolution «

May 10th, 2010 | Author: sarcozona

From Genome: The Autobiography of a Species in 23 Chapters:

[T]he remarkable truth is that we come from a long line of failures.  We are apes, a group that almost went extinct fifteen million years ago in competition with the better-designed [note: I take serious issue with this phrasing] monkeys.  We are primates, a group of mammals that almost went extinct forty-five million years ago in competition with the better-designed rodents.  We are synapsid tetrapods, a group of reptiles that almost went extinct 200 million years ago in competition with the better-designed dinosaurs.  We are descended from limbed fishes, which almost went extinct 360 million years ago in competition with the better-designed ray-finned fishes.  We are chordates, a phylum that survived the Cambrian era 500 million years ago by the skin of its teeth in competition with the brilliantly successful arthropods.  Our ecological success came against humbling odds.

May 03rd, 2010 | Author: sarcozona

I attended the very last lecture of my evolution class this semester last Friday.  Like all the rest of the lectures, it was impossibly dull.  This professor has made facts out of things I thought could never happen, like falling asleep during a lecture on sexual selection.  Despite my professor’s best efforts, however, I’m still interested in evolution.

To make up for my terrible professor, I’ve been listening to this fantastic course on human evolution and doing some reading.  In addition to reading my textbook cover to cover (twice) to stay awake through lecture, I read Genome: The Autobiography of a Species in 23 Chapters, which a friend loaned me last summer and probably thinks he’s never getting back.  (If you’re reading this, Dave, I really and truly promise to send you all the books you loaned me.

Genome is a popular science book and you don’t need to know anything about genetics or evolution to get through it.  It’s a bit outdated – a lot has happened in the field in the last 10 years, but the basics are solid and not one part is even a little dull.  I particularly liked how the book was structured: a chapter for each chromosome and a related theme.  I was worried at first that it would feel segmented, but the themes were well connected and very obviously part of the larger whole.  One of the fun things about this book is that he focused so much on what we don’t know and how (then) recent findings created far more questions than they answered.  That’s how science works and he captured the excitement of that process well.

July 02nd, 2009 | Author: sarcozona

I was really worried about my mom’s visit, but we had a really wonderful time.  She’s changed a lot – she believes that evolution happens.  This is a huge step away from biblical literalism.  Her rejection of creationism meant that she could truly enjoy our trip to the Museum of Northern Arizona.

ammonite fossils

Ammonite Fossils

The museum has an awesome geology exhibit on the Grand Canyon that explores how the land has changed over time.  Fossils from different layers are a large component of the exhibit.  They’re a lot more interesting when you don’t believe god put them there to test your faith.

June 22nd, 2009 | Author: sarcozona

E.O. Wilson in Consilience: The Unity of Knowledge

Perhaps God did create all organisms, including human beings, in finished form, in one stroke, and maybe it all happened several thousand years ago.  But if that is true, He also salted the earth with false evidence in such endless and exquisite detail, and so thoroughly from pole to pole, as to make us conclude first that life evolved, and second that the process took billions of years.  Surely Scripture tells us He would not do that.  The Prime Mover of the Old and New Testaments is variously loving, magisterial, denying, thunderously angry, and mysterious, but never tricky.

May 30th, 2009 | Author: sarcozona

Welcome to the 17th edition of Berry Go Round!  Before you get started here, you may want to check out the 16th edition hosted at Quiche Moraine.  It’s full of exciting posts on mutualism.

GrannyJs knitted leaf. ID, anyone?

GrannyJ's "knitted leaf." ID, anyone?

GrannyJ’s A garland of leaves at Walking Prescott, is a beautifully illustrated post comparing the shapes and colors of a variety of leaves.  As she says, leaves are “quite as interesting as flowers, though not nearly as gaudy.”  My personal favorite of her many examples is a leaf that looks like it’s been knitted!

In addition to some garden plants, she posted quite a few shots of natives.  One of the features many of them have in common are tough, evergreen leaves.  If you want to have leaves that stick around in the desert, they should be tough, filled with some nasty chemicals, and good at conserving water.

Jeremy Yoder presents Seed dispersal by ants: A lousy way to travel, a good way to diversify posted at Denim and Tweed, saying, “Myrmecochory, or seed dispersal by ants, is an evolutionary “key innovation” that helps generate new species – not because it’s such a great way to disperse seeds, but because it actually isn’t.”

I find ant-plant mutalisms fascinating.  If you liked Jeremy’s post as much as I did, you may also be interested in this Science article about ants, Acacia, and large mammal herbivores.  Ants protect Acacia from large mammal herbivores and are rewarded with nectar. When the mammals were kept away from the plants for a number of years, the Acacia stopped providing so much nectar for the ants.  This seems like a good thing to do – why waste resources feeding the ants if you don’t need them to project you anymore?  However, the lack of nectar caused the ants to lose their competitive edge against stem boring beetles which did all kinds of damage to the trees and even caused many of them to die.

Sand Lily

Sand Lily

Sally at Foothills Fancies writes about a trip to Lair o’ the Bear and despite the rather scary title – Live at the Bear’s Lair – the post is full of flowers, not carnivores.  This Sand Lily is just one of the lovely wildflowers she highlights, sharing this interesting little tidbit:

In these spring plants, the ovary is below ground level, so the pollen tube has a long way to go to reach it. The seeds mature underground and later get pushed out onto the surface where they can germinate.

While it sounds like Sally had a great trip, she was disappointed at not getting any good pictures of Pasqueflowers (Pulsatilla patens). Lucky for us, Priscilla Stuckey of this lively earth presents us with both lovely photos of Pasqueflowers and their strategy for fending off snow and ice along the Front Range of Colorado in Pasqueflower’s risky business.

Pasqueflower

Pasqueflower

Janet Creamer from Midwest Native Plants, Gardens, and Wildlife has another wildflower-filled post for us – Flowers and such from Boch Hollow.  When I saw her photo of Running Buffalo Clover and learned it was endangered, I got a little nervous – wasn’t that the plant I spent half my childhood pulling out of our flower gardens? I was relieved to find out that it was not!  The weed I remembered is White Clover, which is in no way endangered.

Emily at No seeds, no fruits, no flowers: no problem shares her first field trip of the season in First ferns.

Dryopteris goldiana fiddleheads

Dryopteris goldiana fiddleheads

She has several stunning fern photos featured, including these Dryopteris goldiana fiddleheads.  They’re ENORMOUS and kind of look like some sort of larvae to me. Luckily, they don’t squirm and have such nice colors, so I’m not disgusted.  When I went to Lotusland last year, I was impressed with the fiddleheads on one of the ferns I saw there.  They were as large as my fist!

Martin Nuñez at The EEB and flow blogs a recent paper that shows that Artemisia tridentata recognizes itself.  How cool is that?

Last but not least, I’ve got some ID puzzles for you all!  I met David while I was teaching English in China.  He’s currently teaching in Suzhou, which is famous for its gardens.  The following photos were taken in The Lingering Garden and he wants to know what these plants are.  He didn’t get shots of the leaves or growth habit, which makes this a bit more of a challenge.

Click on any of the photos for a larger image.  Also, I highly recommend browsing the rest of David’s flickr photos – they’re wonderful!

Unknown #1

Unknown #1

Unknown #2

Unknown #2

david3

If you’d like to stick around for a bit, you might be interested in my series on extinct plants or the trip I took with my university’s botany club last spring.

That’s the end of Berry Go Round #17! Use the carnival submission form to send in posts for the next Berry Go Round. I’m not sure who’s hosting the June edition, but you can always check the blog carnival index page. which will be held at Foothills Fancies.

May 18th, 2008 | Author: sarcozona

Georgia: even more of a backwater than you thought.

Read a book, plant a tree. I need a lot of these.

You don’t believe in evolution. You just believe it.

To believe in something takes faith, trust, effort, strength. I need none of these things to believe evolution. It just is. My health is better because of medical research based on evolution. My genetic code is practically the same as a chimpanzee’s. My bipedal feet walk on an earth full of fossil missing links. And when my feet tire, those fossils fuel my car.

I was told that Australia was wider/larger than the continental US. But that’s not true! They’re just about the same size. The continental US is 8,080,464.25 km² and Australia is 7,617,930 km². Whew! I was worried about my knowledge of geography for a few days.

World’s best headline: Republicans Vote Against Moms; No Word Yet on Puppies, Kittens. And it just gets better. This reporter is angry, and rightfully so.

Neither is Boehner likely to be helped by a Senate ethics committee decision yesterday exonerating Sen. David Vitter (R-La.) over his use of the “D.C. Madam’s” call girls. The Senate cleared him because the prostitution occurred when he was in the House — and the House can’t punish him because he left for the Senate. The madam, meanwhile, killed herself by hanging last week.

Dear animal rights activists against all animal testing, you aren’t allowed to go to the doctor ever again.

You thought Jeremiah Wright was a problem? John McCain refuses to renounce a man he calls a moral compass even though he argues for the murder of millions of people, just because they’re Muslim.

Ok, so maybe this is the world’s best headline: Great tits cope well with warming.

March 13th, 2008 | Author: sarcozona

Poor Brazilians figuring out who’s really screwing them over

A very addictive game

John McCain is a hypocrite

John McCain thinks I’m a baby machine

Another university goes after the people who aren’t really cheating

A song to brighten your day

It’s a computer, it’s a mouse brain!

Frida Kahlo, survival, and the stories we tell ourselves

Survivor: scientists edition

UNC drag show pictures

Poorly trained campus police + assault rifles = dead students

Pulp fiction cover art (and atheists)

A very big squid

Rapid evolution of a plant in Montpellier

US “democracy” in action

June 06th, 2007 | Author: sarcozona

Calling evolution “Darwinism” is like calling gravity “Newtonism.”

June 02nd, 2007 | Author: sarcozona

Angry Astronomer has a good critique of Sam Brownback’s op-ed piece on evolution in the NY Times. If you didn’t watch the Republican presidential debates, Brownback is one of the three who said they did not believe in evolution. From the critique:

He [Brownback] states, “we cannot drive a wedge between faith and reason. I believe wholeheartedly that there cannot be any contradiction between the two.”

That’s a cute, rosy little picture. Too bad it’s quite divorced from reality. While the two need not be completely at odds, it’s inevitable that one of the two will occasionally get things wrong, and upon discovery, can and should be expected to yield. With the matter of evolution, it is well supported. Yet the faithful refuse to yield.

Things like evolution and climate change don’t really care whether or not you believe in them.