Search results
Results From The WOW.Com Content Network
The narwhal was scientifically described by Carl Linnaeus in his 1758 publication Systema Naturae. [5] The word "narwhal" comes from the Old Norse nárhval, meaning 'corpse-whale', which possibly refers to the animal's grey, mottled skin and its habit of remaining motionless when at the water's surface, a behaviour known as "logging" that usually happens in the summer.
Artiodactyls have been hunted by primitive humans for various reasons: for meat or fur, as well as to use their bones and teeth as weapons or tools. Their domestication began around 8000 BCE. To date, humans have domesticated goats , sheep , cattle , camels, llamas, alpacas, and pigs .
The brain-to-body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [ 62 ] Small whales are known to engage in complex play behaviour, which includes such things as producing stable underwater toroidal air-core vortex rings or " bubble rings ".
Sperm whales have the largest brain mass of any animal on earth, averaging 8,000 cm 3 (490 in 3) and 7.8 kg (17 lb) in mature males, in comparison to the average human brain which averages 1,450 cm 3 (88 in 3) in mature males. [44] The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans. [45]
For humans, we're 99.9 percent similar to the person sitting next to us. The rest of those genes tell us everything from our eye color to if we're predisposed to certain diseases.
The results show that haplogroup D introgressed 37,000 years ago (based on the coalescence age of derived D alleles) into modern humans from an archaic human population that separated 1.1 million years ago (based on the separation time between D and non-D alleles), consistent with the period when Neanderthals and modern humans co-existed and ...
Homo sapiens (humans) are monotypic, as they have too little genetic diversity to harbor any living subspecies. [15] Limnognathia maerski is a microscopic animal and the only species in the monotypic phylum Micrognathozoa. The narwhal is a medium-sized cetacean that is the only member of the monotypic genus Monodon. [16]
African elephants call each other and respond to individual names — something that few wild animals do, according to new research published Monday. Scientists believe that animals with complex ...