The World Around Us

High resolution electron microscopy of a sample of red rain that fell jn Kerala, India.

High resolution electron microscopy of a sample of the red rain that fell in Kerala, India showing internal structures and evidence of a replication cycle and now identified as Trentepohlia algae spores . The cells are about 3 micrometres in diameter.

Credit: CCAB, Cardiff University,after N.C. Wickramasinghe et al.