The bear, even though it is a very heavy and bulky animal, it can run pretty fast, and can easily outrun a human, but this is while running straight or when making gradual turns. The situation changes if the human starts running in a zigzag pattern. The human is much lighter, quick acceleration, long thin legs, and is much more agile, which will all be its advantage because in this kind of a chase the agility and acceleration are crucial. The bear on the other hand, will find it very difficult because its weight will disable it to make quick turns, it has a slow acceleration, and is not agile. So a human with a solid amount of stamina with using this tactic has a pretty good chances of escaping a charging bear.
It was Stanley Miller. He utilized electrical charges and chemicals from the environment to make amino acids.
The Miller-Urey test was quickly perceived as a critical achievement in the investigation of the starting point of life. It was gotten as affirmation that few of the key atoms of life could have been integrated on the primitive Earth in the sort of conditions visualized by Oparin and Haldane.
