1. While other photos of the iceberg exist, the note makes this one particularly intriguing.

2. For many workers, AI is a looming iceberg that could destroy their livelihood.

3. Alexa, Google Now and Siri are just the tip of the iceberg of the upcoming artificial intelligence revolution.

4. Only about three miles of ice are keeping the iceberg attached to the shelf, the ESA says.

5. Smartphones are the tip of the iceberg as investigators mine everything from DVDs to tablets and desktop PCs for evidence.

6. Potter also said the union believes the layoffs could be the tip of the iceberg as individual schools assess their budgets.