Pronghorn were almost perfectly fitted to the West Texas landscape. And then people started building fences. By Sterry Butcher.
Biodiversity refers to the variety of all living things on Earth, but people often have very specific ideas of what it means. If you run an online search for images of biodiversity, you are likely to find lots of photos of tropical rainforests and coral reefs. Those ecosystems are invaluable, but biodiversity also exists in many other places. More than half of the people on Earth live in cities, and that number is growing, so it is especially important to understand how biodiversity patterns occur in our man-made environments.
Whichever (if any) start date is chosen, plastiglomerate—a substance that is neither industrially manufactured nor geologically created—seems a fraught but nonetheless incontrovertible marker of the anthropogenic impact on the world; it is evidence of human presence written directly into the rock. By Kirsty Robertson. (Dec. 2016)
Horse breeding records are some of the most impressive efforts to chronicle animal lineages in human history, with some stretching back thousands of years. Yet decoding the genetic origins of today’s horses has proved remarkably difficult. Now, a new study finds that nearly all modern horse breeds can be traced to two distinct, ancient Middle Eastern lines that were brought to Europe about 700 years ago.
This may sound a little repetitive, but it's impossible to ignore: The decline in solar costs is not slowing down. GTM Research expects a 27 percent drop in average global project prices by 2022, or about 4.4 percent each year. Those improvements are not limited to the U.S. They are occurring globally, and in some cases resulting in even sharper price declines than those America is experiencing.