UFO and alien believers have been awfully excited this summer due to several convincing photos of objects that look like animals or humans on the planet of Mars.

All of these images can be explained by science though, CNN reports.

The photos appear to show strange objects like a cloaked woman, a crab-like creature, a lizard or a crashed spaceship. These photos have been taken by NASA's Curiosity Rover and published to the Internet. Once believers see these photos, they start believing there is life on Mars. These images are more than likely oddly-shaped rocks and believers' eyes are playing tricks on them.

A recent image appears to show a spaceship. UFO believers are claiming this is a spaceship that crashed into the Red Planet.

"I found this anomaly in the latest Curiosity Rover photo. The black object looks like a crashed UFO," writes Scott C. Waring on the UFO Sightings Daily website.

"The craft is only about 2.5-3 meters across, so it probably only held a few passengers. Since many of the figures we found on Mars are about 5-8 cm tall, then we can conclude that his [sic] ship could carry about 20-40 passengers." 

Miniature aliens inside a tiny aircraft sounds unbelievable, but there has also been sightings of a giant crab creature and a cloaked woman "staring" back at the Curiosity rover. 

The high definition cameras show high-quality images, but when zoomed in, images might appear to be something else. 

Ashwin Vasavada, a scientist who works on the Mars rover project, told CNN that people are convinced they are seeing something because they believe they are seeing a familiar pattern or object and their brain considers it the real thing.

Vasavada explains the staring woman:

"...when you zoom in and kind of look at the light and shadows, it does look like a little figure of a woman," he admits. "But she would be a few inches tall and hasn't moved in months, so we don't think that's what it is."

Vasavada enjoys hearing what people claim to see objects and figures on Mars. He and his team do not take their claims very seriously, but he does hope that aliens are someday confirmed by NASA.

"There is no group that would be (happier) to see such a thing than the 500 scientists around the world who work on this Curiosity rover," he says. "So far we haven't seen anything that is so obvious that it would be similar to what these claims are." 

Vasavada says that many of the pictures taken from the Curiosity rover are not that weird at all; many of the landscapes on Mars were formed just like they were formed on Earth.