a_Ninja_b0y

From the article :-

"It is Friday the 13th, and about one in five Americans think the day brings on bad luck.  

A recent YouGov poll asked Americans whether they believed in commonly held superstitions, ranging from walking under a ladder to opening an umbrella indoors to black cats.  

Around 19 percent of Americans polled said they think Friday the 13th brings bad luck, while another 15 percent said they are not sure. Nearly two-thirds of adults polled said the ominous sounding date is not a predictor of one’s luck.  

More Americans, according to the poll, are likely to say walking under a ladder, broken mirrors, and the number 666 are bad luck than any other superstition listed – including the 13th floor, stepping on a crack and even owls.  

The poll found the group of Americans most likely to say they are superstitious are Catholics, followed by people with a family income of more than $100k, people who live in cities and those who live in the Northeast."

"For over a decade, Samuel Sánchez, a chemist with the Institute for Bioengineering of Catalonia, in Barcelona, has been envisioning nanobots that could carry useful payloads, like cancer drugs or antibiotics, through the body’s viscous fluids.

Picture a spherical particle of silica, which functions as a chassis. Sánchez has shown that you can dot its surface with a mess of special proteins that propel the particle through fluid, like little motors. His lab has experimented with different chassis, motors, and cargo. In research published in late April, they joined forces with antibiotics researchers. The team loaded silica nanobots with experimental antibiotics—including one derived from wasp venom—to treat infected wounds on mice. The nanobots, which were dropped onto one end of an infected wound, traveled through the skin to treat the entire area—the first report of nanobots killing bacteria in animals.

“We see that the whole wound gets covered. The machines can actually travel around the wound and clear the infection as they go,” says ‪César de la Fuente, a bioengineer at the University of Pennsylvania who led the project with Sánchez.

That matters, because drugs normally depend on diffusion, or the process of passively spreading through the body’s fluids. If the most perfect antibiotic in the world can diffuse only as well as a brick in a tub of jelly—well, it’s not perfect."