The exploration of the planet Mars has received a great deal of publicity over the past few years, and human missions to the Red Planet seem far more inevitable today than ever before. Yet, despite the groundswell of interest in Mars, some have argued that we don't have a mandate for humans to go to Mars any time soon. Are these skeptics correct?
Until now, known viruses have contained so little genetic information that people have questioned whether they can even be thought of as living. But giant viruses like this one contain as much information as many bacteria, which are certainly alive, and are so big they can be seen with an ordinary microscope.