Mars Anomalies in 4K | Hidden Facts

From Martian crabs to strange lights. From Bigfoot sightings to complex patterns, in this video we're going to bring you the very best of Martian anomalies. This is our biggest and most anticipated video ever, so let's get right into it.
One of the most famous Martian anomalies is the face on Mars. Captured in 1976 by NASA's Viking-1 orbiter, it provided decades of suspense and wild theories before more detailed images could be taken to put the matter to bed in 2001.
So why do we clearly see a face in the 1976 image? This is down to a phenomenon called pareidolia, where humans are biologically programmed to look for patterns in random data.
It's the reason we see faces in clouds and was a useful thing for our ancestors to survive in the wild.
In 2017, Curiosity snapped a picture, which some have pointed out contains what looks like a cannonball. Again, pareidolia is likely at play.
This so-called cannonball is only a quarter inch, or 5 millimetres in size. It is actually a pebble made from hematite, a substance commonly found on Mars. What is interesting however, is that the presence of hematite signals an abundance of water in the ancient past.