speculation

Killer whales sink another boat off the coast of Spain — why are they still doing this after 6 years? A small, endangered pod of orcas off Spain and Portugal has sunk at least eight boats since 2020, and despite speculation, the real explanation might have nothing to do with revenge

From speculation to science: Humans are born musical - EurekAlert!

50 years ago, NASA sent 2 spacecraft to search for life on Mars – the Viking missions’ findings are still discussed today | The measurements made during the Viking biology experiments have been the subject of many analyses and speculation as to whether they detected living micro-organisms on Mars