EnvironmentHow fear drastically shapes ecosystems: Best ideas of the century Understanding the “landscape of fear” that predators create in their environments has helped us uncover just how drastically humans have upended the natural world Features
HealthWe can rewrite our genetic code: Best ideas of the century Our genomes are filled with errors that were once impossible to correct. But in CRISPR, we finally found an extraordinarily powerful tool for treating genetic disease – and perhaps making better versions of ourselves Features