Grand Canyon Hike
March 2023
Tree in Davis Mountains with
Arm Sling, March 2022
With Giant White Squill, August 2020
Vall del Madriu-Perafita-Claror, June 2019
In Banff 2019
CIMPA School in Ibadan 2017. Photo: Olanrewaju Johnson
Blackcomb Glacier Cave 2016
Alpe de Suisi 2015
Hawaii Lava 2014
Yosemite 2013
Sokoto, Nigeria, 2012
Norrviken 2011
Lake Mäleren 2011
Banff 2010
Innsbruck 2009
Schweitz im 2008
München 2006
Banff 2004
Talk at U Michigan 2001
U Mass 2001
Wisconsin 1999
MSRI in 1996