Bees can excavate timber and make their brood-chambers in hollow plant-stems.
This can create considerable additional expense, especially if you have to rent equipment to excavate or pour a concrete slab foundation as opposed to gravel.
Programs of this nature give you prompts to help you excavate some of your best memories.
In March 1876 the trustees of the British Museum despatched Smith once more to excavate the rest of Assur-banipal's library.
The lowest part of the surface of this rock was reached after excavating through alluvial deposits to a depth of about 70 ft., but owing to its fissured and cavernous nature it became necessary to excavate to much greater depths, reaching in places more than 120 ft.