How can we explain the fact that no single species predominates? A generally accepted hypothesis is that a trade-off exists between organisms able to acquire and consume more food than other when ...

In early 2018, two high-profile clinical trials of drugs for Alzheimer’s disease ended in disappointment. The drugs joined a long list of potential treatments that have failed to deliver significant ...

Last week, the pharmaceutical company Merck pulled the plug on a closely watched Alzheimer’s drug trial. The drug verubecestat, an outside committee concluded, had “virtually no chance” of benefit for ...