Quoted: PhysOrg news: Scientists create darkest material

Quoted: PhysOrg news: Researchers develop 2-D invisibility cloak

Quoted: PhysOrg news: A midsection between the head and the long tail of sperm contains mitochondria, organelles that generate a cell's power. But sperm have also developed a second energy source to power their long tail. They employ a process known as glycolysis, which breaks down glucose to derive ATP, which cells use for energy.

The pathway for glycolysis requires 10 enzymes. Using special "targeting domains," sperm tether these to a fibrous sheath that runs the length of the tail. In this study, the researchers are trying to re-create this glycolytic pathway by modifying each protein's targeting domain so that they can instead bind to nickel ions on a manufactured chip.

Cheap Nanoscale Power Source

Quoted: Vanessa Alarcon saw them while working at an antiwar rally in Lafayette Square last month. 'Is that mechanical, or is that alive?' "

That is just one of the questions hovering over a handful of similar sightings at political events in Washington and New York. Some suspect the insectlike drones are high-tech surveillance tools, perhaps deployed by the Department of Homeland Security.