If it’s true that these are interstellar and were very abnormally strong, a non-mundane hypothesis would be ablative shells around probes. The actual probe cou

If it’s true that these are interstellar and were very abnormally strong, a non-mundane hypothesis would be ablative shells around probes. The actual probe could be small. It lands in the ocean from which it can observe simple microbial life without even needing locomotion of its own.