There has been stories of physical evidence being deliberately erased by our governments, but there is still enough evidence available to give you an idea that we are not the only ones on this planet with an evolved consciousness/intellect.
The following is the main index with links to all the subpages. Each link leads to a separate page.
The Starchild Skull, Mexico: a very unusual and well studied skull, at least partially non-human.
The Sealand Skull, Denmark: a well preserved and strange skull with large eye sockets.
The Rhodope Skull, Rhodope mountains, Bulgaria: extremely odd skull, studied by scientists who don’t have a clue what it is.
The Bolshoi Tjach Skulls, Adygea, Russia: two odd skulls with left and right protrusions and lack of a mouth opening.
The Novo Selo Skull, Macedonia: an authentic dog-man, wolf-man or werewolf skull.
Bulbous Skulls: a variety of voluminous, round skulls.
Horned Humanoid Skulls: human looking skulls that grew horns.
Chupacabra Skeletons: Several stories that appeared in the newspapers about chupacabra carcasses found by farmers or locals. Also footprints.
The Kyshtym being, Russia: a small humanoid being seen alive by several people. Well researched and sketched
The Conception being, Chili: a tiny, humanoid, but strange looking mummified corpse
The La Noria, Aracama, being, Chili: a similar tiny corpse
The Kovashi River being, Sosnovoborsky, Russia: the remains of the upper body of similar tiny humanoid creature
The Andes body, Peru: a preserved mummified alien body with large head, kept in a secret location
The Pedro mummy of Wyoming, USA: a well known mummy of a small humanoid being found in a cave
The Tres Cruces body, Peru: another preserved mummified alien body with large head, kept in a secret location
The Ucumar of Cerro El Creston, Argentina: a small animal looking head but thought to be of a humanoid
The Karaj body, Iran: a tiny mummified body, looks genuine, but was for sale as a hoaxed body
Filiberto Caponi Close Encounter, Italy: several pictures of a live humanoid entity, most likely burned or hurt
The Fresno Beings, California: very unusual stick-like beings caught on video
Various Pictures of Alien Beings: a small selection of pictures of supposedly alien beings
Bigfoot: surviving hominid species, analysis and stories
Giants: history of archaeological finds of giants skeletons which always disappear into the basements of museums