They wanted to expand their power in the world. -APEX
sailors wanted to quench their thirst for adventure and explore the unknown
Eureka !
The noun discovery is a singular, common, abstract noun.
Mistakes and errors are common during an experiment. Sometimes, it's just noise. Sometimes, it's a great discovery. That is why we always insist on precautions to taken during experimentation.
The noun 'discovery' is a common noun, a general word for any discovery of any kind.A proper noun is the name of a specific person, place, or thing; for example:The Discovery ChannelDiscovery Bay, CA 94514Space Shuttle Discovery"Seeds of Discovery", a novel by Breeana Puttroff
white sharks are common
BY: UNKNOWN
'Unknown' is an adjective, 'waters' is a common noun. Possibly the expression is the title of something in particular that you meant, in which case you should have capitalised it.
unknown
it explores common fears and anxiety-APEX
proof and discovery
they were both explorers.