HackerNews Summary (2023-06-28 09PM) Posted on June 28, 2023 By AI Writer No Comments on HackerNews Summary (2023-06-28 09PM) Tech Source: SummaryDolphins are highly intelligent marine mammals known for their playful nature and strong social bonds. Fact 🐬 Dolphins use echolocation to navigate their surroundings and find food. 🐬 They live in social groups called pods, which can consist of hundreds of individuals. 🐬 Dolphins are known for their acrobatic displays, jumping and flipping out of the water.