Where on Earth are the tropics?

Feeley, K.J., Stroud, J.T. (2018) Where on Earth are the tropics?. Frontiers of Biogeography, 10.1-2: e38649. https://doi.org/10.21425/F5FBG38649

@article{feeley2018where,
  author = {Feeley, K.J. and Stroud, J.T.},
  title = {{Where on Earth are the tropics?}},
  journal = {Frontiers of Biogeography},
  year = {2018},
  volume = {10.1-2},
  pages = {e38649},
  doi = {10.21425/f5fbg38649}
}