TY - GEN AU - Dorgan,Kelly M AU - Jumars,Peter A AU - Johnson,Bruce AU - Boudreau,B P AU - Landis,Eric TI - Burrowing mechanics: burrow extension by crack propagation SN - 1476-4687 PY - 2005///0223 KW - Acoustics KW - Animals KW - Annelida KW - physiology KW - Elasticity KW - Gelatin KW - chemistry KW - Geologic Sediments KW - Locomotion KW - Soil KW - analysis KW - Stress, Mechanical N1 - Publication Type: Journal Article UR - https://doi.org/10.1038/433475a ER -