Imagine an invisibility cloak that works just like the one Harry Potter inherited from his father. Researchers in the United Kingdom and the United States think they know how to do that. They are laying out the blueprint and calling for help in developing the exotic materials needed to build a cloak.
A vaccine that blocks infection by four types of human papillomavirus could cut global deaths from cervical cancer by more than two-thirds, its manufacturer said in seeking federal approval. Merck wants Food and Drug Administration approval for its Gardasil vaccine against the two of those four types of human papillomavirus, or HPV, believed responsible for about 70% of cervical cancer cases.
The first of two Nasa rovers is safely on its way to Mars, but the riskiest part of its seven-month journey to the Red Planet lies ahead, as some humiliating failures have shown all too well.