delve into 復習
きのこについて学べる「きのこ博士館」が取り上げられています。
Let’s go to the museum / Introducing mysterious world of mushrooms
About 5,000 mushroom species are estimated to exist in Japan, but only one-third of them have been categorized — little is known about many of the varieties. You can delve into the mysterious world of mushrooms at the Ibaraki prefectural Kinoko Hakase-kan (Mushroom doctor’s museum).
The inside of the museum is designed to resemble the log cabin laboratory of a fictitious “mushroom doctor.”
An about 10-meter-tall tree welcomes visitors at the entrance of the museum, and well-known mushrooms are displayed at the base of the tree, including hiratake oyster mushrooms, commonly known as shimeji in Japanese, and tamagotake Caesar’s mushrooms, which are popular for their unique flavor.
The tree is surrounded by eight exhibition rooms in which visitors can learn about mushroom species that grow in strange places, an artificial mushroom cultivation system, and other fungal-related issues.
以下省略
http://the-japan-news.com/news/article/0003960417
delve intoを取り上げます。 “the mysterious world” が後ろにくることから、知らない分野へ踏み込むということを表しているのだろうと思いました。『ライトハウス英和辞典』（第5版 研究社）で引くと「くまなく捜す（among, in, into）；（深く）探求（詮索）する」とありました。
LDOCEには “to try to find more information about someone or something” や “to search for something by putting your hand deeply into a bag, container etc” と定義されています。
ここではきのこのことについてより深く知ることができるということを “delve into” を用いることで表現していると考えられます。（aqua）
