About one in 100 children has a common brain disorder called Chiari 1 malformation, but most of the time such children grow up normally and no one suspects a problem. But in about one in 10 of those children, the condition causes headaches, neck pain, hearing, vision and balance disturbances, or other neurological symptoms.
Most modern viruses have ancient roots. New research suggested RNA viruses are millions of years old, many tracing their evolutionary histories back to the earliest vertebrates. Some viruses may be as old as the first animals.
When the finance ministers of the G7 countries proposed the G20 in the late 1990s, a good sense of realism prevailed. They recognized that addressing issues of global finance required the political support from — and involvement of — emerging market economies.