This sounds like the hypothetical lifeforms in the National Geographic Our Universe book, except that the creatures with the big ears are from Mars, not Venus:
The cover of Our Universe:
Unfortunately, Buzz is correct, this is indeed stock footage.
You can find the original, full colour clip on shutterstock. It is listed as created by a company called CFH Design, who are based in Brazil.
I'm going to say pretty confidently that it is not from a real film (from the golden age of science fiction), because it contains elements that cannot plausibly have been created at the same time.
The flying saucer has an absurdly retro Art Deco look to it, which probably would have looked dated rather than futuristic by the time of the first reported "...
I believe this clip is from the Warner Bros production of Tarzan, which ran from 1966 to 1968.
The episode in question was Track of the Dinosaur, and I believe it first aired on 6th Jan 1967.
The synopsis on IMDb reads like this:
Tarzan and Jai visit the Katonga people, finding them in fear of a strange creature in the hills. Tarzan finds an old foe Curt ...
Douglas Hill - Huntsman, Warriors of the Wasteland, and Alien Citadel.
The Alien race is the slavers; they capture the protagonist (Finn) family, and in the course of trying to rescue them ends up saving the world.
Baer is from a race of servants to the Slavers, but is a bit of an independent thinker and joins Finn.
Some relevant quotes from the first novel (...
It's actually Uncanny X-Men #122 from 1979. If #544 includes the pages posted in @Valorum's answer it's a re-print.
Entering an old apartment building where her parents used to live, Storm is surprised to find that it is now an abandoned tenement and a junkie shooting gallery. When the junkies squatting there assault her, she uses her weather powers to ...
This is Masterminds by Gordon Korman.
Eli Frieden has never left Serenity, New Mexico...why would he ever
want to? Then one day, he bikes to the edge of the city limits and
something so crazy and unexpected happens, it changes everything.
Eli convinces his friends to help him investigate further, and soon it
becomes clear that nothing is as it seems in ...
"The London Times of 1904". A copy is available here as well as likely in other locations on the Internet.
In "From The London Times of 1904", The Author Mark Twains dabbles in Science-Fiction, talking about a fictional Telectroscope, a fictional device invented by the year 1904, which would allow a person to send information, images and ...
Could it be Mighty Max (1993)?
The series follows Max, an adventurous teenage boy who receives in the mail a small statue of a fowl, inscribed with Egyptian hieroglyphs whereof the translation states: "You have been chosen to be the cap-bearer. Go to the mini-mart and wait for a sign, Mighty Max". Shocked by the message, Max drops the statue, ...
Sounds like Vanilla Dunk by Jonathan Lethem, originally published in the September 1992 issue of Isaac Asimov's Science Fiction Magazine.
The other place you might've read it in the mid-'90s would be Lethem's The Wall of the Sky, the Wall of the Eye anthology, published in 1996.
The Wikipedia page for the anthology includes a summary of this individual story:...
Iron Man #43 - #46 ?
This sounds like the first version of the character "The Guardsman" (the armour has detrimental mental effects, and he loses control while stopping protestors)
The armour is usually green, but in earlier appearances it appears to be blue and green
The character that became Guardsman first appeared in Iron Man 31 Nov 1970, and ...
You were reading good quality at the time, but this is not a Bradbury, instead it was a master of horror. The story title is "The Holiday Man," (1957) and can be found in the wonderful compilation The Best of Richard Matheson.
Your description is mostly accurate, but he just sees all the deaths for the upcoming holiday weekend in the story, rather ...
Pretty sure this is Naraku no Adu (AKA Adu of Hades).
Adu is no ordinary human being. He is actually one of the 12 most powerful Demon Kings who, after making a pact with an angel, has been allowed to materialize into a human's body in the real world under one condition:
He must seek and destroy all of the other Demon Kings.
Being one of the most powerful ...
This is the Sword of Shadows series by J. V. Jones. There is a detailed Wikipedia article on the first book A Cavern of Black Ice.
The boy is Raif Sevrance and the girl is Ash March. I would guess the character you remember as Dun is Dunness Fey, who is leader of the Thanelords.
The members of Raif's tribe are all given a lore, which I think is a kind of ...
This might be Simon Hawke's "A Glint of Gold" (first published under the pen name of Nicholas Yermakov). It's about genetic manipulation, not drugs. According to this article, "Yermakov's story focuses on the human (well, mostly human) costs of single-purpose people", which would match up with your idea that the characters are ...
Could it be Oblivion Island: Haruka and the Magic Mirror? Released in 2009 Japan, the 3D animated film follows the story of a girl, Haruka, who after falling into a mysterious pool in the woods, befriends a rabbit/fox hybrid who then helps her into disguise; it's a mask resembling a rabbit, in order to blend in.
This sounds very much like Les seigneurs de la guerre a novel by Gérard Klein published in French in 1970, and later translated to English by John Brunner (a noted sci-fi novelist in his own right) and released in 1973 as The Overlords of War.
The main character, George Corson, is indeed in the Earth military, which is fighting a war against a bird-like ...
Could this be The Runelords (1998) by David Farland...?
The Runelords is a series of fantasy novels by American author David Farland of which the first part was published in 1998. In the universe of The Runelords, there exists a unique magical system which relies on the existence of distinct bodily attributes, such as brawn, grace, and wit. These attributes ...
You're right, it is Vonnegut, specifically The Sirens of Titan (1959). Quoting from the plot summary on Wikipedia:
Salo, the Tralfamadorian explorer, is a robot built millennia earlier to carry a message to a distant galaxy. His spacecraft is powered by the Universal Will to Become or UWTB, the "prime mover" which makes matter and organization ...
OMEGA by Eva Franz and Andy Goralczyk
Check out this fantastic example of stop-motion skill and creativity the short film called "Omega". The end of evolution awaits in a wasteland dominated by bizarre trash formations, dust and rock. From the scattered remains of a long forgotten culture an electric ecosystem rapidly evolves into the ultimate ...
Could this be Puttnam's Prairie Emporium?
It didn't take place in a diner, but rather and old-fashioned five and dime store.
Many of the other details fit.
It was a Canadian television series that ran for 52 episodes during 1988-1990. It was syndicated in the US, possibly on PBS.
There were two children that lived with their mother and the eccentric owner of ...
Mighty Max (1993–1995)
Max (Rob Paulsen), a twelve-year-old boy, finds a magical cap that can teleport him across dimensions.
Mighty Max on IMDB
The artwork depicts him as wearing a red baseball cap with a big yellow M at a very 90's angle.
Found by searching for: "red hat cartoon alternate dimensions OR worlds"
This is Nito no Taidana Isekai Shoukougun: Saijaku Shoku "Healer" nano ni Saikyou wa Cheat desu ka? (AKA Nito's Lazy Foreign World Syndrome).
Hidako Masamune is a high school student who suffers from continuous bullying by his classmates. Becoming tired of it all, he decides to commit suicide, but instead he is transported to another world along ...
A reverse Google image search indicates it is Saikyou no Kurokishi, Sentou Maid ni Tenshoku shimashita.
Summary from the light novel entry:
Albright, who was famous as “the strongest Black Knight”, was reincarnated as a girl, Maria, whose ribbon suited her well for same reason. Maria, 16 years old, is currently a maid in the Marquess of Urband family in ...
I'm not sure this quite matches but could this be Mysticons? A series that ran from 2017 to 2018? It appears to be about 4 female lead characters The Mysticons fighting the evil of 4 female antagonists The Vexicons. There's quite a detailed synopsis on Wikipedia:
The series is set in the mystical world of Gemina and in its capitol called Drake City, ...
Gentle Beast (2016) by Feng He You Yue.
A girl crossed over to a different world, running into a small wounded animal.
She thought it was completely harmless. She never expected that once he grew up, it would be this world’s most ferocious beast.
It's this one if there are still people looking. I came across this question while I was looking for the novel; ...
I finally found this; it's Star Games (1978) by Jim Razzi, Richard Brightfield and Jack Looney.
Here is the front cover of the book, and you can see the wheel and the windows set into it (the "Galactic Computer"!):
The big bad is called "The Krakon," some kind of semi-immortal robot leader, who is leading the "Dark Horde" to ...
I believe this is Thru the Moebius Strip (2005).
Thru the Moebius Strip (Chinese: 魔比斯环; pinyin: móbǐsī huán) is a Hong Kong–produced 3D-CGI feature film, made in mainland China.
The story is about the coming of age of a 14-year-old boy who grew up refusing to accept the loss of his father. He reaches the planet Raphicca 27.2 million light years away to ...