Speaking of madness, hold your horse.
Prakushi’s free-roaming central Asian horse, often called the last wild horse, is the only living horse that has never been domesticated. But new genetic analysis of ancient horse bones suggests that these horses, after all, have tame ancestors that make them wild, not wild.
These findings also reveal the idea that these domesticated ancestors, known as botai, were promoted to all other modern horses. The ancestors of today’s domesticated horses have become mysterious, the researchers reported in the online journal science on February 22.
The first known domesticated horse was an ancient human from northern kazakhstan (SN: 28 March 2009, p. 15). The remains of horses and milk, dating back to about 5,500 years ago, suggest that animals provide transport and food.
Today, in order to understand botha horse and horse, the museum of natural history Denmark evolutionary geneticists ludovic’s Orlando, the relationship between the and colleagues analysed throughout Europe and Asia over the past 5000 years or so the DNA of 88 horses. In the past 4,000 years, less than 3% of horses have shown that different and unknown horses have created today’s population. The study found that the dog was a direct ancestor of the antelope.
Fishing has left great space for the earth. The oceans covered more than two-thirds of the earth’s surface in 2016, with industrial fishing accounting for 55 percent of the area, the researchers reported in the February 23 issue of the journal science. By contrast, only 34 percent of the earth’s land is used for agriculture or grazing.
Previous efforts to quantify global fishing have relied on extensive data from electronic surveillance systems, logging and shipboard observers. But over the past 15 years, most merchant ships have been equipped with an automatic identification system (AIS) transmitter, a tracking system designed to help ships avoid collisions.
The team found that most fishing was concentrated in national exclusive economic zones – about 370 kilometres from a country’s coast – and in hot spots near the high seas. These hotspots include the nutrient-rich upwelling areas of the northeast Atlantic, South America and west Africa.
Surprisingly, five countries – China, Spain, Taiwan, Japan and South Korea – account for nearly 85 per cent of fishing on the high seas outside the country’s exclusive economic zone.
Researchers say tracking the fishing footprint of space and time can help guide conservation and international conservation efforts. This is particularly important in times of rapid change, as ocean temperatures rise and human activity on the high seas increases.