For centuries, the Amazon rainforest was described as an untouched wilderness where only small, scattered groups of people could survive. Early-twentieth-century scholarship argued that the region’s ...

Diagram of the electromagnetic spectrum, with visible spectrum and light highlighted separately. The full range of electromagnetic radiation, organized by frequency in Hertz and wavelength in meter.

Beneath the dense rainforest canopy of Panama, laser pulses fired from aircraft have exposed what centuries of ground-level exploration missed: a network of pre-Columbian settlements, complete with ...