Just how tall are forests around the world? A new global map shows forest canopy height at 1‐kilometer spatial resolution. Simard et al. used satellite data from the Geoscience Laser Altimeter System aboard the Ice, Cloud, and land Elevation Satellite (ICESat) to create a global map of the height of the forest canopy. They validated their map by comparing it with field measurements of canopy height from sites around the globe. The authors compared their map against another recently published map of canopy height and found that it was better correlated with the field data. They also found canopy height differences across forest disturbance gradients.