whether tachyons can travel beyond cosmic event horizon of observable universe? *Short answer* Tachyons, if they exist, might be able to travel beyond the cosmic event horizon, as they're hypothetical particles that can move faster than light. However, this is purely speculative, and the existence of tachyons is still unconfirmed. https://whatsapp.com/channel/0029VaEF4IL7DAWtD6Na5Y3E