While I’m talking about explorers, I’ll try and be careful about calling them discoverers or claiming they ‘discovered’ anything. Usually wherever they went they were met by friendly local people who helped them amazingly generously. Often they would simply not have been able to explore without this help. They were guided to water and told about and shown the places, animals and plants of the regions by knowledgeable locals and then guided back to their ships. Would they have done so if they knew what was coming next!?
Here’s a fascinating map: Land actually discovered by European explorers:
Cartographer Bill Rankin calls it ‘Ice and Islands, Mainly!’ As far as land mass goes, these islands cover 0,14% of the world’s landmass.