How the barn owl flies so silently? The barn owl makes almost no noise when it flies. This enables it to hear the slightest sounds made by its rodent prey hidden in deep vegetation while the owl is flying up to three metres overhead.
The first important adaptation for silent flight is the overall shape of a barn owl’s wings. They’re broad and rounded with a high surface area, which means barn owls can glide for longer and don’t need to flap so much, creating less sound.
Then there’s the small-scale feather structure. Like other owls, barn owls have specially adapted primary flight feathers, which have a serrated leading edge to disrupt turbulence and prevent it from making any noise. All of this makes a barn owl in flight a perfect stealthy predator.
The Hubble Telescope enables us to look towards very distant objects in the universe. Thanks to this remarkable piece of engineering NASA has been able to create some incredible images, one of which is the Hubble Ultra Deep Field. Created using images from the telescope from 2003 and 2004, the incredible picture displays a tiny patch of the sky in immense detail; it contains 10,000 objects, most of them young galaxies, and acts as a portal back in time. In one picture we are transported 13 billion years into the past, just 400 to 800 million years after the Big Bang, which is early in terms of the universe’s history.