Treasure documentary recommendation?

Here are some good-looking and meaningful documentary recommendations:

1. Planet Earth: produced by BBC, it is a documentary about the earth's ecosystem. It uses high-definition photography technology to show the living conditions and ecological environment of various animals and plants on the earth, making people feel the beauty and mystery on the earth.

2. Battle of Midway Island: This film tells the story of an aerial naval battle between imperial japanese navy and the US Navy in Midway Island during World War II, which had a crucial impact on the outcome of the war.

3. Our Planet: A nature documentary jointly produced by Netflix and BBC shows the living conditions and ecological environment of various creatures on the earth from a unique perspective, which makes people have a deeper understanding of the earth's ecosystem.

4. Whale Song: This film is a documentary that reveals the living conditions and protection of whales, and reveals the impact of human activities on whales and marine ecosystems through in-depth discussion.

5. Free Solo: tells the story of climber Alex Honnold climbing the "El Kapteyn" mountain in California without any safety facilities, which makes people experience the excitement and danger of extreme challenges.