Evolutionary biology

David Coppedge writes: Evidence is growing that organisms share existing genetic information horizontally, not just vertically. This has immense implications for neo-Darwinian theory that are not yet fully recognized. If traits can be shared across species, genera and even phyla, they are not being inherited from common ancestors. The findings might also cast stories about convergence and co-evolution in a completely different light. Let’s look at some of the news on this front. Introgression Last month, Current Biology posted a Primer on Introgression by four authors. Introgression refers to “lasting transfer of DNA from one of the species into the genome of the other” by means of hybridization and backcrossing. Basically, it describes “the incorporation of the DNA from one species into Read More ›

I was thinking recently, about how many audiobooks are consumed by people these days. I would guess that the main reason behind this consumption is convenience. Many people just don’t have the time, or don’t create the time, to really sit down and get their head in a book. But I understand that for many, it can also be due to personal preference, financial considerations, lack of space, being visually impaired, or learning difficulties. If non of these issues are barriers, I would always encourage reading (and ideally taking notes), rather than simply listening. On balance, the evidence does suggest that good reading is a much more efficient way of retaining information than listening, on its own. In general, listening Read More ›