Dating human past biologically table
how we have come to be over the last 170,000 years (modern H.
sapiens) as well as looking at our divergence from the ape lineage around 7 million years ago.
Much of our present understanding is based on very little evidence.
Only a few thousand hominid fossils have been discovered and most of these are incomplete.
Many of the quotes in our collections have been verified for accuracy, but not all have been verified.
A combination of optogenetics, calcium imaging and drug screening by Ulrike Theisen, Reinhard Köster and colleagues identifies three neurotransmitter systems that act successively and coordinately on migrating hindbrain neurons in the developing zebrafish A molecular map of nearly 250 chemosensory receptors in the model nematode Caenorhabditis elegans by Berta Vidal, Oliver Hobert and colleagues provides an entry point for functional studies and offers a host of markers for studying neuronal patterning and plasticity.
Darragh O'Brien, Dominique Durand, Sébastien Brier, Daniel Ladant, Alexandre Chenal and co-workers show that the binding of calmodulin to the Cya A toxin of Bordetella pertussis induces a structural disorder-to-order transition within its catalytic domain, serving as an on/off switch to ensure that the toxin is only ever active in target eukaryotic cells.
"A new focus for African prehistory", New Scientist (September 29, 1977) 792-794) "However, there are not enough fossil records to answer when, where, and how H.
Sapiens emerged" (Takahata, "A Genetic Perspective on the Origin and History of Humans" Ann Rv Ecology and Systemtaics, 1995) "Unfortunately, the vast majority of artist's conceptions are based more on imagination than on evidence.