This single-volume thoroughly summarizes advances in the past several decades and emerging
challenges in fundamental research in geotechnical engineering. These fundamental research
frontiers are critically reviewed and described in details in lights of four grand challenges
our society faces: climate adaptation urban sustainability energy and material resources and
global water resources. The specific areas critically reviewed carefully examined and
envisioned are: sensing and measurement soil properties and their physics roots multiscale
and multiphysics processes in soil geochemical processes for resilient and sustainable
geosystems biological processes in geotechnics unsaturated soil mechanics coupled flow
processes in soil thermal processes in geotechnical engineering and rock mechanics in the
21st century.