There is no objective measure for the "toughest" academic course, as difficulty varies greatly based on individual aptitude, learning style, and other factors.
If you're interested in exploring challenging academic courses, you can consider:
* Highly technical fields: Engineering, Physics, Mathematics, and Computer Science often have demanding courses requiring strong analytical and problem-solving skills.
* Advanced studies: Graduate-level courses in any subject can be exceptionally challenging, requiring extensive knowledge, research skills, and critical thinking.
* Language learning: Mastering a language, particularly one with significant differences from your native language, can be an intellectually demanding process.
Remember, the "toughest" course for you will depend on your own interests, skills, and learning style. It's best to choose courses that challenge you while aligning with your goals.