Scientists have used probes and telescopes to seek "biosignatures" - indirect signs of life - on other planets and moons in our solar system and beyond.
Miley Cyrus claims she has had an encounter with aliens. However, the 27-year-old singer admits she was high at the time, so cannot be certain of what she saw.
"My guess is that some alien, cheeky and terrible teenagers left home with their parents' UFO and started planting metal monoliths around the world."
A video of a strange creature has spread like wildfire in India, causing panic among residents and social media users. The strange creature in the video looked like an alien, or a ghost wandering in the streets of the Indian state of Jharkhand.