Apples are definitely a popular fruit no matter where you go. Like others on the list, and many other types of fruits, apples contain cyanide, but not in high levels. The fruit itself does not contain the chemical, but you will find cyanide in the apple’s seeds. Eating all of the seeds in one apple won’t kill you, but it’s definitely not recommended. Of course, if enough apple seeds are eaten, this means chewed and swallowed, it can result in complications.
Interesting fact: Apples float because at least 25% of their mass is nothing but air.