But the explorers soon discover that it's only an acorn falling from a tree.
Yet already, those few hardy explorers have discovered that the Universe around them is stranger than they ever imagined.
An explorer may discover a new continent, but he may also stumble over the world's end.
French explorers discovered the trail in 1615 and used it periodically thereafter.
Locals knew about the ruins, but European explorers discovered them only in the 19th century.
Your explorers early discovered that it is situated between two boundless oceans east and west.
Yet the great explorers could never have discovered the New World without them.
On that first journey, the young explorer discovered a medieval church and was bitten by what he calls "the African bug."
The explorers could not discover one suspicious trace.
And of course, his notes mentioned the spout as something the very first explorers had discovered.