Hawking Considers Computer Viruses Life

A living being like you or me usually has two elements: a set of instructions that tell the system how to keep going and how to reproduce itself, and a mechanism to carry out the instructions. In biology, these two parts are called genes and metabolism. But it is worth emphasising that there need be nothing biological about them. For example, a computer virus is a program that will make copies of itself in the memory of a computer, and will transfer itself to other computers. Thus it fits the...

 Life with Metabolism VS Replication

It is logically possible to postulate organisms composed of pure hardware, capable of metabolism but incapable of replication. It is possible to postulate organisms composed of pure software, capable of replication but incapable of metabolism. And if the functions of life are separated in this fashion, it is to be expected that the latter type of organism will become an obligatory parasite upon the former. This logical analysis of the functions of life helps to explain and to correct the bias...

 The Similies

OF COURSE we were hardly all the similes the Ariekei spoke. Some were animal or inanimate: there was a house in Embassytown out of which, many years before, the Hosts had taken all the furniture, then put it back, to allow some figure of speech. The split stone, made so they could speak the thought, it’s like the stone that was split and put together again. Most, though, were Terre men and women: there was something in us that facilitated. Many similes, of course, were uninterested in thei...

 Taxonomy of Email Chains

Family Pyramides This family is named for the pyramid scheme structure common to all members of the family. Each specimen in this family will include a list of addresses of its last 4 to 10 hosts, and instructs the current host to alter this list by adding his or her address to this list and removing the oldest address from it. Hosts are also directed to send a small sum of money to each name on the list. Family Petitiones Members of this family are characterized by the additional behaviou...

 Pollyanna VS Sod's Law

It's easy to see that predators (animals that kill and then eat other animals) are working for the downfall of their prey. But it's also true that prey are working for the downfall of their .fedators. They work hard to escape bei and it they all succeeded the predators would starve to death. The same thing holds between parasites and their hosts. It also holds between members of the same species, all of whom are actually or potentially competing with on another. If the living is easy, natural...

 Speculation Informed by Science is Not the Same as Fantasy

Our search for life elsewhere is not haphazard or random: our knowledge of physics and chemistry and biology equips us to seek out meaningful information about stars and planets vast distances away and to identify planets that are at least possible candidates as hosts for life. There is much that remains deeply mysterious, and it is not likely that we will ever uncover all the secrets of a universe as vast as ours: but, armed with science, we can at least ask sensible, meaningful questions ab...

 Parasititic Influence on Evolution

Again and again in recent years evolutionary biologists have found themselves returning to the theme of parasites. As Is Richard Dawkins put it in a recent paper: "Eavesdrop [over] morning coffee at any major centre of evolutionary theory today, and you will find 'parasite' to be one of the commonest words in ti the language. Parasites are touted as the prime movers in the evolution of sex. promising a final solution to that problem of problems.'" Parasites have a deadlier effect than preda...