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Aug 26, 2018
Fire on Earth
Image Credit & Copyright: Astronomy Picture of the Day -- http://apod.nasa.gov/apod/astropix.html
Courtesy of http://apod.nasa.gov/apod/astropix.html
Fire on Earth
Image Credit & Copyright: Astronomy Picture of the Day -- http://apod.nasa.gov/apod/astropix.html
Courtesy of http://apod.nasa.gov/apod/astropix.html
Sometimes, regions of planet Earth light up with fire.
Since fire is the rapid acquisition of oxygen, and since
oxygen
is a key indicator of life,
fire
on any planet would be an indicator of life on that planet.
Most of the Earth's land has been
scorched by fire at some time in the past.
Although causing many a tragedy,
for many places on Earth
fire is considered part of a
natural ecosystem cycle.
Large forest fires on
Earth
are usually caused either by
humans or
lightning and can be
visible from orbit.
Featured from the year 2000, stunned
elk avoid a
fire sweeping through
Montana's
Bitterroot Valley
by standing in a river.
