Stephen Herrero, an environmental scientist at the University of Calgary and author of the definitive "Bear Attacks: Their Causes and Avoidance," cites a similar study from Yellowstone showing that when white-bark pine nuts were plentiful, human-bear conflicts in the national park dropped right off.
Examples are plentiful in human biology, including the "aquatic ape hypothesis" (hairless humans must have evolved from early hominins that lived in the sea) and ideas about why humans are good runners or why we hold religious beliefs, or about human form, diet, and behavior (Schlinger 1996; Allcock 2001).
It seems they have a mental target for their desired daily income and they work long enough to reach it, even though that means working longer on slow days and going home early when fares are plentiful.Human beings are not always logical.
But maybe (stick with me here) our saber-toothed predators might experience a massive population explosion, thanks to a plentiful mammoth and human livestock (or perhaps just human) food source.
They are the third-most plentiful ingredient in human milk, after lactose and fats, and their structure ought to make them a rich source of energy for growing babies but babies cannot digest them.
As our ancestors' diets changed over time, their gut inhabitants did, too, from microbes that could easily break down the fibrous foods plentiful in early human diets to other bugs suited to the animal proteins, sugars, and starches prevalent after the advent of agriculture and animal husbandry about 10,000 years ago.
This finding gives support to the theory that good performance of dogs in case of human-given cues may not have a direct predecessor in dog dog communication, but rather relies on dogs' specific attention to humans and/or the plentiful opportunity to associate human directional gestures with food reward during the ontogeny.
Because the period was short, the energy flagging, and the supply of dead humans plentiful, the even harder fact is that it's highly unlikely that humans would have been processed the way the animals had been.
Once the eggs of a female fly are ripe, she lays them in her preferred breeding medium, human feces, plentiful because most people here go to the bathroom outdoors.
But since potassium was plentiful in the early human diet, evolution built in a mechanism for releasing potassium to protect against a hazardous excess, which can cause abnormal heart rhythms and muscular paralysis.
The presence of Arsenic (As, Z = 33) in terms of most plentiful element in the human body, seawater and earth's crust is 12th, 14th and 20th position, respectively (Mandal and Suzuki 2002).
