NIH lose a legal shield

NIH needs a makeover.

This elegantly carved jade face from Liangzhu in southeastern China provides an intriguing glimpse into the beliefs of the people who lived there from 3400 B.C.E. to 2250 B.C.E. As described in a special News Focus section beginning on page 930, discoveries at Liangzhu and other regions far from the traditional heartland of Chinese civilization are revealing surprisingly complex ancient culture...

A Toroidal Magnetic Spacecraft Shield

The use of magnetic fields to deflect energetic charged particles has been proposed as a means to protect astronauts from the harmful radiation encountered in space. These so-called active magnetic shields must provide a region of space which is protected from energetic particles below a given energy while also maintaining a safe level of magnetic field strength within the shielded region. A to...

Farewell to the Lose–Lose Reality of Policing Plant Imports

In an age of free international shipments of mail-ordered seeds and plants, more policing will not stop the global migration of hitchhiking pests. The solution is in a preemptive response based on an internationally coordinated genomic deployment of global biodiversity in the largest breeding project since the "Garden of Eden." This plan will enrich the narrow genetic basis of annual and perenn...

How Does a Dication Lose a Proton?

A detailed study of the mechanism by which a proton is lost from a dication reveals that such processes are more complicated than is often assumed. In many cases, a deprotonation reaction is best viewed as a two-stage process: Initially, the departing unit is better described as a hydrogen atom than as a proton and only later, at some point further along the decomposition pathway, does a sponta...

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