ROOTS Scientists are mulling the ethical implications human germline editing — tinkering with reproductive cells and embryonic tissues like this zygote — while pushing technical boundaries that could make genetically engineered people possible.
SUPERMASSIVE IDEA Black holes, such as the supermassive one illustrated here, have transformed astronomers’ understanding of the cosmos in recent decades.
DRUGS BY DESIGN Bath salts (above) are packaged as a product one might use in the tub. They’ve been linked to deaths.
Simon Head argues that computer business systems leave middle managers and workers with little creative latitude. They acquire fewer skills and their wages stagnate, hurting their job quality and buying power.