Synapses are the key functional elements of the brain. The essential function of the brain is cell-to-cell communication, and synapses are the points at which communication occurs. The human brain has been estimated to contain approximately 100 trillion synapses; even the brain of a fruit fly contains several million. The functions of these synapses are very diverse: some are excitatory (exciting the target cell); others are inhibitory; others work by activating second messenger systems that change the internal chemistry of their target cells in complex ways. A large number of synapses are dynamically modifiable; that is, they are capable of changing strength in a way that is controlled by the patterns of signals that pass through them. It is widely believed that activity-dependent modification of synapses is the brain's primary mechanism for learning and memory.
The primary job of the brain is what?
cell-to-cell communication

Critics argue Napoleon's true legacy must reflect the loss of status for France and needless deaths brought by his rule: historian Victor Davis Hanson writes, "After all, the military record is unquestioned—17 years of wars, perhaps six million Europeans dead, France bankrupt, her overseas colonies lost." McLynn notes that, "He can be viewed as the man who set back European economic life for a generation by the dislocating impact of his wars." However, Vincent Cronin replies that such criticism relies on the flawed premise that Napoleon was responsible for the wars which bear his name, when in fact France was the victim of a series of coalitions which aimed to destroy the ideals of the Revolution.
How many years of wars does Victor Davis Hanson claim are part of Napoleon's military record?
17

After the Voyager 2 flyby mission, the next step in scientific exploration of the Neptunian system, is considered to be a Flagship orbital mission. Such a hypothetical mission is envisioned to be possible at in the late 2020s or early 2030s. However, there have been a couple of discussions to launch Neptune missions sooner. In 2003, there was a proposal in NASA's "Vision Missions Studies" for a "Neptune Orbiter with Probes" mission that does Cassini-level science. Another, more recent proposal was for Argo, a flyby spacecraft to be launched in 2019, that would visit Jupiter, Saturn, Neptune, and a Kuiper belt object. The focus would be on Neptune and its largest moon Triton to be investigated around 2029. The proposed New Horizons 2 mission (which was later scrapped) might also have done a close flyby of the Neptunian system.
What will Argo visit?
Jupiter, Saturn, Neptune, and a Kuiper belt object