Adorable, looks like a tribble, and makes you want to cuddle them.
But these little guys might be the most venomous insect in the US. So don’t pet the fuzzy caterpillar.
Thanks to a remarkably good fossil record, it’s now well established whales and dolphins evolved from land mammals, their forelimbs adapting into flippers, and their hind-limbs almost entirely disappearing. If you’d asked me yesterday what’s going on with that almost—the last vestiges of the hip bones that whales retain, which have no legs to support or direct contact with the rest of their skeletons—I’d have told you they were evolutionary leftovers, and probably going to disappear in another million years or so. I think a lot of other evolutionary biologists (those who aren’t whale specialists, anyway) would’ve agreed with me. But it turns out we’d have been wrong.
As Carl Zimmer describes, a paper recently published in the journal Evolution points out that whales’ hips do have one remaining function, an important one—they anchor muscles that control the penis. And that function is under ongoing sexual selection.
The more promiscuous a [whale] species was, the bigger its pelvis bones tended to be. The scientists also found that as whales evolved to become more promiscuous, their pelvic bones changed shape. These changes weren’t part of some general change to their skeleton, however. The ribs near the hips didn’t show the same patterns of size and shape change.
Did you know that the journal BMC Ecology has an annual photo competition? Harold et al. has recently announced the 2014 winners and the images are incredible! Check out the full, open-access article here (or you can “cheat” and view some of the images as a slideshow here). Lookin’ good, Ecology!
A fungus called Cryptococcus gattii, has long known to be infective to humans… even though it’s found on trees.
This has particularly been a problem in Southern California, where people have been getting sick from C. gattii for yeas, and no one knew which tree was harboring the fungus. Find out who the culprit is and how they figured it out!
Developing successful student – professor interactions can be a very challenging aspect of teaching at the university level. Getting students to ask questions and engage in a class is very hard, especially in large introductory courses. One professor tried to combat this problem using a radical strategy, banning students from emailing her unless they were setting up a time to meet in person. The crazy part is that the strategy seems to have worked. She reports developing better interactions with her students, who actually evaluated her as being more accessible than in previous semesters without such email bans.
Check out the full article here.
What do you think? Would you ban students from emailing you questions about the course? Do you think students would accept and support such as strategy? Would you prefer students to phone you with questions, rather than email?