There's a new flu shot every year, to match the particular flu strains floating around. Some years the shot isn't a good match. Even so, the flu shot is still a good bet.
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Self-esteem and self-confidence seem like pretty much the same thing, but they're not. For example, maybe you can easily get in front of a crowd, give a speech, and command a room, which shows self-confidence, but at the same time, you feel like crap about your own public speaking, which is a lack of self-esteem.
Predicting the future is near impossible -- but that doesn‘t stop us all from having a red hot go. Human beings have been predicting the future since the beginning of history and the results range from the hilarious to the downright uncanny.
One thing all future predictions have in common: they‘re rooted in our current understanding of how the world works. It‘s difficult to escape that mindset. We have no idea how technology will evolve, so our ideas are connected to the technology of today.