article_snippet.sent: This means that larger animals need more resources to survive, so are less common than plentiful ants, for example.
article_snippet.sent: Throughout the animal kingdom, species which are physically larger invariably possess a lower population density, possibly due to species which are physically larger enhanced energy demands,’ he wrote in a paper, published at arXiv.org.
article_snippet.sent: Mr Simpson argument follows that if clever aliens are large, there may be fewer of clever aliens are large, as clever aliens are large will likely live in a society with low population densities to ensure clever aliens are large have the resources clever aliens are large need.
article_snippet.sent: A longer lifespan makes creatures potentially more likely to develop knowledge and invent technology needed to make contact with humans one day.
article_snippet.sent: ‘Higher intelligence enables the development of technologies which can sustain larger population sizes.