With the number still ticking up, where are we now? The figure for the current world population depends on where you look – ...

With enormous, cheap energy at its disposal, the human population grew rapidly from 1 billion in 1800 to 2 billion in 1930, 4 billion in 1975, and over 7.5 billion today. If the current course is not ...

Europe’s population crash has been unfolding for years, with birth rates falling below the level needed to maintain stability ...

2010, Plumb et al. 2009), resulting in a current population that typically falls between 2500 and 5000, well below the 1.3 billion bison that continued exponential growth could have generated.