Mimivirus is the largest and most complex virus known. Is it an evolutionary bridge between nonliving viruses and living organisms, or is it just an anomaly? Aa Aa Aa Viruses are small and fairly ...

Perhaps the most complex virus ever created, it used various flaws in Microsoft's Web server and browser software to unleash itself without the user's knowledge. See Nimda. No relation to 9/11 in ...

The world's first synthetic organism is a tiny polio virus constructed artificially in the laboratory. But it is a first step towards creating more complex forms of life. Within a century ...

Scientists have discovered a new type of immune defense in E. coli bacteria that turns viral infection machinery against the ...