We are not sufficiently convinced of global warming that's why we search more evidence of it....or not....??!?!?
In the spectacular Your Shot gallery, the photographer mentions that the two people in this photo were requested to hold still for the 20 second night time exposure. The expedient of "posing" perfects the composition and allows the figures to not be blurred in the pools of light from their headlamps. The star just above the horizon triangulates the explorer's illumination, as if beckoning the exploration of its distant world also, and situating this place, our planet, in the context of the vastness of interstellar space.
This is a photo of man interacting with the extremes of his environment. By better illuminating what is happening with glaciers we can have a clearer understanding of global weather patterns. These men (everything about there postures indicates them as men) look as if they are in the process of descending into the depths. Though a team, they approach their task from different vantages, and this lends an isolation to the picture that is supplemented by the night sky and icy surrounds.
I like the texture of the near field ice. The accumulation of aggregate materials renders it more like granite than snow.
Technicality / Composition / Content / X factor / originality = 7/10 zoom lenses