Tag Archives: Dog

The domestic dog (Canis lupus familiaris or Canis familiaris) is a domesticated canid which has been selectively bred over millennia for various behaviours, sensory capabilities, and physical attributes. Although initially thought to have originated as an artificial variant of an extant canid species (variously supposed as being the dhole, golden jackal, or gray wolf), extensive genetic studies undertaken during the 2010s indicate that dogs diverged from an extinct wolf-like canid in Eurasia 40,000 years ago.

“The origin of domestic dogs is poorly understood, with suggested evidence of dog-like features in fossils that predate the Last Glacial Maximum conflicting with genetic estimates of a more recent divergence between dogs and worldwide wolf populations. Here, we present a draft genome sequence from a 35,000-year-old wolf from the Taimyr Peninsula in northern Siberia. We find that this individual belonged to a population that diverged from the common ancestor of present-day wolves and dogs very close in time to the appearance of the domestic dog lineage. We use the directly dated ancient wolf genome to recalibrate the molecular timescale of wolves and dogs and find that the mutation rate is substantially slower than assumed by most previous studies, suggesting that the ancestors of dogs were separated from present-day wolves before the Last Glacial Maximum. We also find evidence of introgression from the archaic Taimyr wolf lineage into present-day dog breeds from northeast Siberia and Greenland, contributing between 1.4% and 27.3% of their ancestry. This demonstrates that the ancestry of present-day dogs is derived from multiple regional wolf populations.” –Ancient wolf genome reveals an early divergence of domestic dog ancestors and admixture into high-latitude breeds. Skoglund P., Ersmark E., Palkopoulou E., DalĂ©n L.

The fastest land animals

If you search for the fastest land animals on the Internet, you will find many “fastest animals” lists, most of them are popular “top list” sites. But, in fact, there is a tendency to overestimate the speed of fast animals. Even the speed of the world’s fastest land animal, cheetah’s speed is usually highly overestimated.
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Top 22 most powerful bite forces in carnivore land mammals

Bite force is an important property of carnivore ecology, because these amazing animals need to kill their prey as easily as possible, and the bite force is an vital factor in this context. Here are the top 22 most powerful bite forces in carnivore land mammals.
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