New research provides fresh evidence for killer whales' exceptional intelligence, documenting how these marine mammals use stalks of seaweed as tools to groom each other. https://www.japantimes.co.jp/news/2025/06/25/world/science-health/killer-whales-seaweed-tools/?utm_medium=Social&utm_source=mastodon #worldnews #sciencehealth #killerwhales #whales #oceans #mammals