On the Cover
March-April 2001 Volume 89, Number 2
Public concerns about bioengineered plants have focused largely on
direct threats to human health. In "Ecology of Transgenic Crops,"
however, Michelle Marvier argues that there are also potential threats
to the environment and that these threats are not being adequately
assessed; indeed, measuring the risk is inherently difficult. ...
Genetically engineered plants might generate weed problems and affect nontarget organisms, but measuring the risk is difficult
In a new kind of laser, human cells take part in amplifying light—revealing secrets important in medical diagnosis
Cagelike crystals may soon help to pump heat with electricity and to create electricity with heat
Will future treatments for one of medicine's most intractable problems include the new genetic technologies?
Spices and morning sickness may shield us from toxins and microorganisms in the diet
* access restricted to members and subscribers