1) The Amazon rainforest produces more than 20% of the world's oxygen.

2) Ramen is a popular Japanese dish consisting of wheat noodles served in a flavorful broth, often topped with ingredients such as sliced pork, green onions, and soft-boiled eggs. It originated in China and was introduced to Japan in the late 19th century. Ramen has evolved into a culinary art form, with various regional styles and broth bases, ranging from soy sauce to miso and tonkotsu (pork bone). It is a beloved comfort food and has gained international recognition.

3) A group of flamingos is called a "flamboyance."

4) The blue whale is the largest animal to have ever existed, with an average length of about 82 feet (25 meters).