Alien equal to bear: scientist

Published on May 19, 2015 17:02:02 PM
Ever wondered about the weight or size of an alien?

If estimates of Cosmologist Fergus Simpson from the University of Barcelona are to be believed, aliens weigh a massive 300 kilograms or roughly the size of a bear.

Simpson’s analysis also found that a habitable extraterrestrial planet would hold about 50 million aliens.

Simpson's findings are based on a model called Bayes' theorem and a branch of mathematics called Bayesian statistics, which estimate the probabilities that change depending on the information available.

'Live Science' reported that Simpson started his calculation with the number of individuals who would most likely live in a given alien civilization, and came up with about 50 million or fewer individuals.

Simpson's analysis, on the prepublished site arXiv, also focused on the size of other life forms. He notes about animals on Earth that smaller the size of a species is the more individuals of that species tend to exist. That’s why an alien looking for life on Earth would be far more likely to run into a mosquito than a blue whale as an example.

The relation between size and population can also be plotted on a curve against probability, which predicts that the median weight of an alien would be about 314 kg - about the size of a bear or an elk. Based on the results of this model, about half of extraterrestrial creatures would weigh more than that and half would weigh less, according to Simpson.

However, according to some scientists, this mathematical prediction has some serious limitations. As it is not clear if humans are a random sample of intelligent beings, Michael Kopp, a professor at Aix-Marseille University in France, said he was not sure about the statistical argument.