evolution

Tag archives for evolution

Paleogeneticist Dr. Johannes Krause (University of Tübingen, Germany) and colleagues were interested in the origin of tuberculosis (TB) in the Americas. Since strains of TB found in the Americas are related to strains found in Europe, prior theories held that Spaniards may have introduced it to the Americas while colonizing South America.  The problem with…

Super-sniffing elephants

Like Aesop’s fable, rats have another reason to be envious of elephants. Elephants also have significantly more genes that can detect different smells (i.e. olfactory receptor genes) than other super-sniffers like rats and dogs. In fact, compared to 13 other species, African elephants have 1,948 genes related to smell putting them ahead of the previous…

Frog songs attract bats

Check out this neat video highlighting how frog-eating bats are using frog mating calls to know where to pick up dinner:

Hyenas related to cats?

Ever wonder what dogs and hyenas have in common? Would you be surprised to learn that hyenas are more closely related to cats than dogs? In fact, according to this video thesis, the shared bone-crushing abilities of dogs and hyenas is actually an example of convergent evolution.

Dogs Decoded on now!

I am currently watching a re-run of the NOVA special called Dogs Decoded. If you have not already seen it, you should check it out! It was actually the subjects of a prior blog that you can read here. 

Ancient Horse Genome Sequenced

Researchers have successfully created a draft sequence of the complete genome of a 700,000 year old horse from a bone fragment extracted from permafrost in the Yukon Territory (Canada). This is the oldest specimen ever sequenced by almost 10-fold. Prior sequencing of the whole genome from a hominid from Siberia who lived 80,000 years ago…

Find out why most species of birds do not have a penis in this video abstract of new research published yesterday in Current Biology: Source Herrera AM, Shuster SG, Perriton CL, Cohn MJ. Developmental basis of phallus reduction during bird evolution. Current Biology Published online June 6, 2013. doi: 10.1016/j.cub.2013.04.062

Darwin is the more famous of the two when it comes to thinking about who came up with the theory of evolution. However, a man named Alfred Russel Wallace co-discovered the theory. Alfred Wallace died 100 years ago. In honor of his contribution to the theory of evolution, NPR ran a wonderful story about him…

The uniqueness of humans

I just watched this neat presentation given a few years back by Dr. Robert Sapolsky from Stanford University on the differences and similarities between humans and animals: