Without more rigorous measurement of effectiveness and disciplined recording of our efforts, how will we know if we are progressing as rapidly as needed to achieve our conservation goals? How will we become more efficient? How will we learn from one another? And how will we be able to demonstrate our achievements and build the public and political will needed to expand our resources and meet th…
The human eye is very good at discerning when objects are moving from side to side. If you see your drone moving sideways towards a tree then you know to do something about it. However, once the your drone is a certain distance from you, it becomes almost impossible to tell not only how far away it is, but also whether it is even moving forwards or backwards. Naturally, this increases the chanc…
American Sign Language has had a durable history. Its origin can be traced to the emergence of a large community of deaf people centered around the first public school for deaf children in France, founded about 1761; the language that arose in this community is still being used in France today. In 1817, a Deaf teacher from this school helped establish the first public school for deaf children i…
Books of sporting, travel, and adventure in countries little known to the average reader naturally fall in two classes-neither, with a very few exceptions, of great value. One class is perhaps the logical result of the other. Of the first type is the book that is written to make the most of far travels, to extract from adventure the last thrill, to impress the awestricken reader with a ful…
Six trails lead to the main ridge. They are all good trails, so that even the casual tourist in the little Spanish-American town on the seacoast need have nothing to fear from the ascent. In some spots they contract to an arm's length of space, outside of which limit they drop sheer away; elsewhere they stand up on end, zigzag in lacets each more hairraising than the last, or fill to demo…