Life Sciences

Reconstructing the Biology of Extinct Species: A New Approach
A computer reconstruction of an adult female baboon skull from high-resolution x-ray computed tomography (CT) slices. The skull is rendered transparent to show the position of the three semicircular canals and cochlea of left inner ear filled in red. The enlargement of the canals and cochlea is five times the size of the canals shown in the skull. Each canal is approximately 5 mm in diameter. Credit: Alan Walker lab, Penn State
Pugh Named Willaman Professor in Molecular Biology
Caribbean Amphibians Started with a Single, Ancient Voyage on a Raft from South America
Credit: Blair Hedges, Penn State Red frog from mountains of Haiti. Eleutherodactylus audanti, from Massif de la Selle.
Krasilnikov and Nekrutenko Receive Young Investigator Awards
Patterson Named Searle Scholar
Analysis of Rhesus Monkey Genome Uncovers Differences with Humans, Chimps
Credit: Gopinath Sricandane For image reprints, contact the photographer at: gopi@photoessays.net
Cooper and Peters Honored as Student Marshals, Spring 2007
Scientists Discover Structure of Gateways to Gene Control
This artist's illustration shows a portion of the genome. A long DNA molecule (red cord) is wrapped up into nucleosome structures with a histone-protein core (white spheres). The gateway to gene transcription spans the control switch (coils) on the left nucleosome to the beginning of the gene (green arrow) on the right nucleosome." Credit: Christina Ullman
Bjornstad and Weiss Earn Faculty Scholar Medals for 2007
New Protein Super-Family Discovered with Functions Critical for Animal Life
The DANGER family member, DANGER1A, is expressed in a variety of cells (brown color) which lose their ability to divide including nerves, muscle, and neuroendocrine cells. DANGER1A is first expressed in the developing mouse (embryonic stage 13.5) in the spinal cord (arrows), with increasing expression in post-natal day 0 mice, and is maximal in the adult mouse brain. Credit: D. Neil Watkins (Sidney Kimmel Cancer Institute, Johns Hopkins University)
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