SciShow
Why You Can't Hear Volcanoes Erupt
Even if a volcano is just a few miles away, you might not hear it erupt. How is that possible? It has to do with a phenomenon known as sound shadows! Hank will tell you all about it in this new episode of SciShow! Join us!
SciShow
The Secret Language of Elephants
You are probably aware of the fact that elephants make trumpeting noises - but did you know that most of their communication is so low pitched that humans can’t even hear it?
Getty Images
Misty forest landscape, Mpumalanga, South Africa
Misty forest landscape, Mpumalanga, South Africa
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park.
Getty Images
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Getty Images
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Getty Images
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Looking down into the Langdale Valley above valley mist formed by a temperature inversion on Loughrigg, near Ambleside in the Lake District National Park, with cars driving on the Hawkshead road.
Getty Images
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Getty Images
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Getty Images
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Mist over the Lake District mountains at dusk from the summit of Red Screes, Lake District National Park, Cumbria, UK
Curated OER
Denver's Brown Cloud
Why does a brown cloud occur in Denver at a certain time of the year? When warm air is higher in the atmosphere, it traps cooler, denser air below and smog just sits in between them. Using bottles of colored hot and cold water, this...
Steve Spangler Science
Denver's Brown Cloud - Cool Science Experiment
Why does a brown cloud occur in Denver at a certain time of the year? When warm air is higher in the atmosphere, it traps cooler, denser air below and smog just sits in between them. Using bottles of colored hot and cold water, this...