For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

The Academy of Hebrew Language has informed former hostage Yarden Bibas that it is renaming the "Ketmit Jerusalem" butterfly to "Ketmit Ariel" in honor of his four-year-old son, Ariel, who was ...

Two big culprits for this are nonnative milkweeds leading to parasites and monarch butterflies raised in captivity and released without the necessary migratory skills.