Please support us on Patreon: https://goo.gl/ZVgLQZ And subscribe! http://goo.gl/EpIDGd This video sponsored by: http://www.youtube.com/TheNilFacts And thanks to Subbable supporter Raed Massoud for helping make MinuteEarth possible! Humans can go inside or put on clothes, but trees spend winter naked in the cold. Why don't they all die? Created by Henry Reich Animation: Ever Salazar Production and Writing Team: Alex Reich, Peter Reich, Emily Elert Music: Nathaniel Schroeder: http://www.soundcloud.com/drschroeder Want to add captions to MinuteEarth videos? - minuteearth.subtitl.us MinuteEarth is available as a free iTunes podcast! - https://goo.gl/sfwS6n Facebook - http://facebook.com/minuteearth Twitter - http://twitter.com/MinuteEarth MinuteEarth provides an energetic and entertaining view of trends in earth's environment -- in just a few minutes! References Cavender-Bares, J. (2005). Impacts of freezing on long distance transport in woody plants. Vascular transport in plants, 401-424. Davis, S. D., Sperry, J. S., & Hacke, U. G. (1999). The relationship between xylem conduit diameter and cavitation caused by freezing. American Journal of Botany, 86(10), 1367-1372. Ewers, F. W. (1985). Xylem structure and water conduction in conifer trees, dicot trees, and lianas. International Association of Wood Anatomists Bulletin,6(4). Pittermann, J., & Sperry, J. S. (2006). Analysis of freeze-thaw embolism in conifers. The interaction between cavitation pressure and tracheid size. Plant Physiology, 140(1), 374-382. Willson, C. J., & Jackson, R. B. (2006). Xylem cavitation caused by drought and freezing stress in four co‐occurring Juniperus species. Physiologia Plantarum, 127(3), 374-382. Zanne, A. E., Tank, D. C., Cornwell, W. K., Eastman, J. M., Smith, S. A., FitzJohn, R. G., ... & Beaulieu, J. M. (2013). Three keys to the radiation of angiosperms into freezing environments. Nature.