At that time, these cavities, which burrowed downward like wells, became dumping grounds for refuse — broken crockery, bedpans, urns, clay pipes, combs, glass bottles.
Negative phototaxis triggered by increasing ROS concentration allows some motile cyanobacteria to shield themselves from intense sunlight and gain exposure to optimal intensity light by burrowing downward [35], [36].
A long downward burrow is enlivened with a series of artificial narrative crises, each of which efficiently eliminates a crew-member, and halfway through there's another, spectacular sequence above ground thrown in, showing San Francisco's Golden Gate bridge collapsing - tacitly acknowledging that they're boring down there in every sense.
The inlet tunnel was running downward from the entrance in case of M. booduga burrows whereas it was running upward in M. terricolor burrows.
[48] Tudhope and Scoffin found even more complex C. subterranea burrow networks that typically had 5 or more downward-inclined chambers radiating from a central U-shaped burrow.
The burrow, always constructed away from grassy vegetation, is downward-sloping and is between 0.8 and long with a diameter of 8 cm.
This book's greatest secrets are subterranean as it burrows into the infrastructures of cities and takes a downward spiritual turn toward the First Realm, a form of hell.
As a consequence, the availability of nitrate as electron acceptor for anaerobic respiration (denitrification) also increases due to downward irrigation transport and nitrification occurring in oxic burrow walls.[51, 65, 66] However, direct evidence for increased availability of Mn4+ and Fe3+ as electron acceptors in bioturbated sediments is lacking.
Nickell and Atkinson report several C. subterranea burrow casts from muddy Scottish Loch sediments with single, nearly vertical shafts extending downward from a lattice of horizontal tunnels.
