Friday, May 31, 2013

Botany picture #70: Thlaspi arvense


Thlaspi arvense (Brassicaceae), Germany, 2012. This I found one of the easiest Brassicaceae that I had to learn in the first year botany course in university. The fruits are very characteristic, and it is a fairly common weed of building sites and agricultural fields.

Wednesday, May 29, 2013

Mopping up the remaining synchronous species concepts

It is time to pick up writing about species concepts again (other posts in this series can be found under the eponymous tag). I have dealt at some length with Biological Species, Genotypic Cluster Species, Morphospecies / "typological" / autapomorphic species, and the idea that species must be monophyletic. There are numerous synchronous species concepts left before I can tackle the asynchronous ones, but unfortunately I do not feel that I can treat all of them in the same depth. Some of them are simply variants of others, some apply only to very special cases, and some I simply don't really understand. I will therefore deal with all of them together in this post.

Tuesday, May 28, 2013

Botany picture #69: Callistemon pollandii


Callistemon pollandii (Myrtaceae), Australian National Botanic Garden, 2013. This pretty treelet is known as the gold-tipped bottlebrush because of the striking contrast between the yellow anthers and the red filaments.

Monday, May 27, 2013

My two cents on academic freedom

Some parts of the science blogosphere that I am following have been discussing the case of a professor called Eric Hedin over the past few weeks. From what has been reported, he has been offering an elective course at his US American public university that awards science credit but consists mostly of Christian apologetics and proselytizing, with a liberal sprinkling of creationist pamphlets but no real science included in the reading list.

The interesting thing is that rationalist and atheist scientists divided into two camps over the issue: evolutionary biologist Jerry Coyne and now physicist Victor Stenger argue that the university should scrap the course while developmental biologist PZ Myers and biochemist Larry Moran defend Hedin's right to teach unscientific nonsense with reference to academic freedom.

Part of this seems to be based on a misunderstanding; Myers, for example, claims that Coyne and Stenger are calling for Hedin to be fired but they did no such thing. The most forceful position taken by Coyne appears to be that such a course violates the US constitution.

Now I don't really have a horse in this particular race. Not being a US American or in the USA, I really have no opinion on their constitution. (Except perhaps that they should consider doing what every other country does and adopt a new one one of these days, perhaps one that was not written for the era of slavery, horse-drawn carriages and front loaded muskets. But I digress.) What interests me here is the concept of academic freedom.

As a German, I have learned about academic freedom in the historical context of the Goettingen Seven, and thus assumed that it was about being able to publicly hold a controversial opinion without being fired for it. But surely academic freedom cannot entail a professor not doing their job?

Thought experiments are always enlightening when faced with discussions like these, and of course Coyne and Stenger have already offered them. What if a physicist used one of their classes to promote a political party, or if a chemist awarded science credit for a course whose reading list consisted entirely of objectivist "philosophical" tracts? Would that also be acceptable under the banner of academic freedom? What if all tenured professors of a university decided, hey, we don't want to teach the students science anymore, we will all just award science credit to whoever reads the entire bible?

Perhaps even more interesting would be the following scenario: What if Hedin were promoting not Christianity but instead filled the reading list of his course with works of Wahhabi theology? Would his Christian supporters still be defending his "academic freedom" in that case? Let's just say I have my doubts.

Yes, academic freedom is important. Hedin should have the right to believe and publicly say controversial things, even to try and convert people to his sect. But in his science courses at a public university, I would argue he is supposed to teach science. That is not a question of academic freedom, it is a question of doing the job one is being paid to do by the taxpayer.

From that perspective, the slippery slope arguments invoked by Myers and Moran also don't apply because there is no slippery slope to be had between saying that a professor should not proselytize or teach theology in their science class on the one side and a professor being forbidden to teach good science in their science class on the other side.

Saturday, May 25, 2013

Botany picture #68: Maianthemum bifolium



Maianthemum bifolium (Asparagaceae), Germany, 2012. A rather unassuming liliaceous monocot forming part of the rich spring flower carpets in European temperate forests. It is apparently related to the more impressive genus Polygonatum.

Friday, May 24, 2013

Carbon dioxide milestone

This is old news, of course, but we recently passed 400 ppm carbon dioxide in our atmosphere. The following cartoon seems to say it all (click here for full version):


Mind you, that cartoon is on an American leftie website, so among the currently 82 comments on it you will not find the usual climate change denialism that descends on every other place daring to mention the topic. But what you do find is an also fairly typical pair of defensive reactions:
  1. Yeah, I needlessly waste a lot of petrol, but it is not really my fault because industry is worse.
  2. Yes, our industry is a bad polluter, but it is not really our fault because China is worse.
It can be assumed that a Chinese commenter would be inclined to argue that others are still worse on a per-capita basis and that China has the right to develop.

One of the greatest impediments to solving our global problems is that people consider this type of argument to be clever: "Yes, I am doing something suicidally stupid but that guy over there does the same, so stop bugging me."

Thursday, May 23, 2013

Botany picture #67: Aseroe rubra


I have never had the opportunity to learn much about fungi beyond the classification into Ascoymcota and Basidiomycota and a few theoretical details about their life cycle. The point is, I never had a course on the systematics or identification of fungi, so I really do not have a good overview. This truly bizarre species, however, is really easy to recognize. Aseroe rubra, the "starfish fungus", Australia, 2011.