It's biocompatible, biodegradable, and micromoldable. It is, say its inventors, twice as strong as nylon or polylactic acid (PLA), while exhibiting the strength of an aluminum alloy at half its weight. In short, Shrilk is a new bio-inspired, sci-fi sounding insectoid material promising low cost and high performance that was developed by researchers taking a leaf from nature's own book.  

Natural designs have been tried and tested throughout the eons of time it has taken for these to evolve. Poor designs fall by the wayside; sustainable innovations get passed on to future generations, to be used and improved on. Today, one of the fastest growing fields in science is called "biomimicry", in which researchers look to the natural world to find inspiration for new products, and to learn how to build in ways that are more efficient, lower-cost, and environmentally friendly.

First coined by a natural sciences writer called Janine Benyus, biomimicry is all about "replicating nature's blueprint". Which is exactly what researchers Javier G. Fernandez, Ph.D. and Donald Ingber, M.D., Ph.D. at Harvard University's Wyss Institute for Biologically Inspired Engineering
 looked at when studying the challenge of developing a material that could provide protection without adding weight or bulk.  

They saw that natural insect cuticle, such as that found in the rigid exoskeleton of arthropods  -invertebrates with segmented bodies and jointed limbs, such as insects and crustaceans - not only provided protection, it also provided structure for the insect's muscles and wings. While so light that it doesn't inhibit flight, it is also so thin that it allows flexibility.

Harvard released a statement that said that "insect cuticle is a composite material consisting of layers of chitin, a polysaccharide polymer, and protein organized in a laminar, plywood-like structure. Mechanical and chemical interactions between these materials provide the cuticle with its unique mechanical and chemical properties. By studying these complex interactions and recreating this unique chemistry and laminar design in the lab, Fernandez and Ingber were able to engineer a thin, clear film that has the same composition and structure as insect cuticle."

They named the material "shrilk" because chitosan is commonly isolated from shrimp shells, while the protein used, called fibroin - comes from silk.

One of the most interesting aspects of  the living insect cuticle is that it has a range of material properties that can vary from very elastic to very hard, apparently depending on water content. Remarkably, shrilk exhibits similar versatility and it can be reversibly transformed between rigid and highly flexible states by altering water content alone.

In their article, published in the online issue of Advanced Materials, Fernandez and Ingber write that, its outstanding strength and versatility, as well as its low cost and density, make shrilk an excellent candidate as a biodegradable plastic that could have great value as a replacement for existing non-degradable plastics in a wide range of consumer product application areas, including disposable bottles, trash bags, packing materials, and diapers that currently pile up in waste sites around the planet. Because chitosan and fibroin are both biocompatible, shrilk on its own or in combination with other materials or crosslinking agents may be valuable for certain medical applications, such as wound dressings and scaffolds for regenerative medicine. Finally, due to the biological origin, wide availability, and low cost of its components - shrimp shells are a waste material -  shrilk represents an abundant and sustainable material that can be seamlessly integrated into the environment within several ecological cycles.

A researcher in China says that 88 percent of the blood samples taken from children in Guiyu, China clearly show lead poisoning. The findings are made more significant by their publication in the government-owned China Daily. China has, until recently, downplayed reports of Guiyu's e-waste hazards.

Huo Xia, a Shantou University medical college cytologicial analysis professor, visited the town in southern China and convinced parents to let her test the blood of their children for lead, according to China Daily. The results showed that 88 percent of the 167 children tested, all under six, had lead poisoning in 2010, a big jump from the 16 percent among 227 children tested in 2009.

The paper reports that Huo can't explain the rise of the number of children with lead poisoning between 2009 and 2010. However, a decrease occurred in 2009, with the number of children testing positive for lead poising dropping from 81.8 percent to 16 percent, which Huo attributes to global economic conditions leading to reduced volumes of electronic scrap processed in Guiyu.

Huo has analyzed the blood of about 1,000 children since 2004 and found alarming levels of lead. Some had levels of at least 13 micrograms of lead per deciliter of blood, higher than the 10 micrograms that World Health Organization says is "cause for serious concern." Many of the children, which are exposed to the toxic metal through air pollution and from dust on their parents work clothes, show signs of physical deformity, adversely-affected mental health and behavioral problems.