1. Aliens, there are surely many species of intelligent extra-terrestrial life out there in our universe, but I'm sure they haven't visited us, because if they ever do visit us, we will all know very quickly.
Watch Penn & Tellers Bullsh*t on alien abductions.
2. Bigfoot, no such thing. Everyone has an HD camera with them nowadays, and yes people still wander the great woods of this planet. It's fantasy. Just like the Loch-ness monster.
3. Moon landings. Yes we went to the moon. 6 times! All the conspiracy theories can be easily dismissed. All the conspiracy theories are purposefully wrongfully presented, so that an uninformed or ignorant viewer will believe it is actually fact.