Look: explorers of all elements -- land, air, sea -- undertake their endeavors to accomplish a singular goal: the discovery of the unknown. An uncertainty of one's destination brings with it, therefore, an uncertainty of one's success and therefore of one's survival. And this is a risk that all explorers knowingly and willingly undertake -- it is a condition precedent to being such a brave traveller.
Accordingly, I think to shed so dark and negative a light on the several tragedies during mankind's nascent years of exploration is to miss the point and indeed forsake the very thing for which those pioneers lived: the furthering of our race, the advancement of our species.
Rather than mourn the loss of our fellow adventurers in their quest into the unknown, we should instead celebrate them, not only for their accomplishments in life, but additionally and especially in death.
After all, but for their risks, but for their selfless ability to consciously put their lives on the line both for their countries -- and indeed for our species as a whole -- and, certainly, to satisfy their thirst for knowledge and discovery, we would still be travelling the European continent on horseback.
As indecent as it may sound, I am certain our great explorers would be disappointed to see us saddened by their loss, and that they would far rather their memories be praised with all the pomp and circumstance worthy of their triumphant accomplishments, failures and successes alike.