Drones throw up a tangle of ethical questions.

ECONOMIST: The ethics of warfare

The orb had a top panel that could lift up, revealing a tangle of wires and several small clocks.

CNN: ASIANOW - TIME Asia | Asia Buzz: Travel in Time

So for example, efforts to rebuild schools and hospitals, to repair damaged roads and bridges, to get people back to their homes -- they were tied up for years in a tangle of disagreements and byzantine rules.

WHITEHOUSE: A Commitment to Restoring New Orleans

One striking sequence shows Endurance buried up to her deck in ice, a tangle of rigging and splintered timbers, every surface thickly covered with hoar-frost.

ECONOMIST: Antarctic exploration

His orange monk's robes, hitched up to show stout boots and socks, would tangle in the bushes.

ECONOMIST: Preah Maha Ghosananda

The maps of these days, superimposed, would have made a tangle, but every morning he emerged from the same place, just as the sun came up, and every evening he returned there, tired now, darkened, switching off the bike, rolling it over the wooden threshold of the door leading into the courtyard, the engine ticking as it cooled.

NEWYORKER: Nawabdin Electrician