Studying how many are infected with swine flu [Effect Measure]

While I was otherwise occupied with family matters last week there was news on the flu front that got past me. Declan Butler at Nature News reported on the extensive efforts to get a handle on the prevalence of swine flu infection in various populations by looking for evidence the immune system has reacted to the presence of the virus. All of the studies mentioned are still underway or being peer reviewed so Butler didn't report results, but Fergus Walsh did report some preliminary but leaked results from one of the smaller studies in the UK. Both reports have interesting information, but I'll start with Walsh's first:

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A Tip Cell During Blood Vessel Formation

A 3D view of the leading endothelial cell (tip cell) in a developing blood vessel (isolectionB4-labelled, green). This particular cell possesses numerous thin projections called 'filopodia'. These filopodia are rich in actin filaments (phalloidin-labelled, red). Filopodia explore extracellular cues and are important for the migration of endothelial cells during the formation of new blood vessels, a process known as angiogenesis. Scale: 49.2X49.2X15 um. Franco et al., Developmental Cell 15(3 ...
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YouTube - Peer Review in 5 Minutes

Centrosome size and function in nematode embryos

Early development of two C. elegans embryos expressing GFP-histone to mark nuclei/DNA and GFP-SPD-2 to mark centrosomes. The embryo on the left is a zyg-1(it25) mutant that is unable to duplicate its centrosomes and thus assembles monopolar spindles at the two-cell stage. The embryo on the right is a zyg-1(it25) szy-20(bs52) double mutant. The szy-20(bs52) mutation suppresses the zyg-1(it25) centrosome duplication defect so that bipolar spindles are formed at the two-cell stage. Song et al ...
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Parrots Dance to Rhythmic Music

The ability to move to a beat has long been believed to be uniquely human. However, research has now shown that this capacity is not unique to our species, but exists in a variety of animals, all of which are also capable of vocal mimicry. This video shows examples of the behavioral response of two parrots to rhythmic music. See Schachner et al. for further information. Video of second subject recorded by Irena Schulz; visit her YouTube channel for additional videos of this subject: www ...
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Pinker, Round Two http://j.mp/4XpHzu

sandygautam: Pinker, Round Two http://j.mp/4XpHzu

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Rook uses stones to raise water level and get food 3

Monroe selectively chooses to use larger stones rather than smaller ones. Monroe flies to the testing platform and investigates the apparatus before the stones are added. Monroe adds three large stones before successfully acquiring the worm. She then leaves the testing platform. See the paper by Bird and Emery, Current Biology 19(16): www.cell.com
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Chimp Tool Use in Kibale Forest: The Kanyawara Community

Chimpanzee populations throughout Africa differ in tool-using behavior, a likely example of animal culture. We exposed two Ugandan groups at Budongo and Kanyawara to an unfamiliar problem, honey trapped within a fallen log. We found that individuals relied on their cultural knowledge to solve this problem. The video shows how a Kanyawara chimpanzee manufactured a stick to access the honey. See the paper by Gruber et al., Current Biology 19(21), published online Oct. 22, 2009: www.cell.com ...
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