Our species is largely the dominant species because of one or more extinction events. Most likely "more" ; a significant chain of them. And perhaps better comp

Our species is largely the dominant species because of one or more extinction events. Most likely "more" ; a significant chain of them. And perhaps better computing is why the polar ice caps are only shrinking this fast and not faster. We normally see 30-40 MPG in cars, and that is due to a lot of things, but the one big thing is electronic engine control. That is one in a long list of reasons why it's important to at least see how we can make these things work better.