There's been a five-fold decrease in ocean life in the last 12,000 years? Is that true? Does anyone know the source on that? And, anyway, what is a five-fold reduction? Is that an 80% reduction, or is that 5 orders of magnitude (99.999%)? Does it measures species or the number of members of each species? It sounds amazingly serious, but it is such a big number to throw around that my first reaction is to not believe it.