solar-heat

There may be a new planet joining the solar system. A provocative hypothesis posed by a duo of planetary astronomers from the University of Louisiana-Lafayette includes the existence of the planet Tyche: a ninth planet estimated to be four times the size of Jupiter located somewhere at the outermost reaches of the solar system. It’s hard to know what is more enjoyable: stories about planets …

This may come as a surprise, but the link between sustainability and environmentalism is actually fairly recent. Before 1980, sustainability was an uncommon variant of sustainable, as in “capable of being upheld,” and it could be used in any context. But in 1980 that all changed when the International Union for the Conservation of Nature published the World Conservation Strategy, including an entire section called …