Scientists have finally explained why killer whales struggle to hear blue whales, and the answer may have helped the giants survive for millions of years

• PC: AI GeneratedWhales are well known for their songs.
• But scientists have discovered that, for some whales, those songs may also help them stay alive.
• A researcher from the University of Washington has found that some baleen whales, including blue, fin and minke whales, have evolved to sing at such low frequencies that killer whales, their only natural predator, cannot hear them.