We know from fossil evidence that Neanderthals evolved in Europe around 400,000 years ago, and later (~150,000 years ago) spread into western Asia, before disappearing from all areas in their range about 30,000 years ago. However, it can sometimes be quite hard to be certain whether or not a fossil is from a Neanderthal, which […]
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more forensic genetics – and the origins of multicellular animals
When I'm lecturing about animal diversity and the origins of the multicellular animals (aka metazoans), I point out the similarity between the single-celled protozoans called choanoflagellates and the choanocytes (or 'feeding cells') of sponges. The textbook interpretation is that choanoflagellates may have shared a common ancestor with metazoans, and there's an increasing amount of genetic […]
Continue readingpolio & evolution
I read quite a few science blogs & just stumbled across this excellent post about polio virus: the vaccines we use against it, the virus's evolutionary responses – oh heaps of stuff. And a chilling photo of a ward full of polio patients in iron lungs: in extreme cases the patients lost the ability to breathe […]
Continue readingscientifique kiwis
Gosh, we had a good Cafe Scientifique this week. My friend & colleague, Dave Lambert, was there to talk about his latest project – sequencing the kiwi genome. (That's kiwi bird, not kiwi people.) And he wants to get you involved!
Continue readingbetter s*x from headless males…
On Monday night a newspaper article caught my eye – the reporter had picked up on a study suggesting that, if you’re a female praying mantis, eating your partner during sex can actually be quite beneficial…
Continue readinguse of colour by early sapiens
This one’s been sitting in my ‘good blogging material’ folder for a while now: time to have a look at it, I think.
Continue readingforensic genetics & an evolutionary puzzle
At the moment I'm lecturing to our first-year biology class about plants. In my lecture about algae, there were a couple of slides about malaria. You might well ask 'why'; I know my students were thinking that. Well, I did have a reason – & today I found a brief summary paper (Keeling, 2008) on just […]
Continue readingcell phones & male fertility
Orac's just blogged on a new study that seems to show that heavy cellphone use contributes to male infertility. No doubt this will be all over the headlines in a day or so – so I thought I'd get in first & give you some practice in critical thinking while I'm at it.
Continue readinggood web articles on evolution issues
Here's a link to a set of articles that summarise talks on various aspects of evolution research. They're straightforward & easy to read, & should give you some interesting additional background to some recurring questions.
Continue readingcoevolution of weta and fleshy fruits
Here's another paper on coevolution – this one a bit closer to home. It suggests a coevolutionary relationship between a weta species and the characteristics of many fleshy fruits of NZ plants (Burns, 2006).
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