Introduce solid foods to a baby around months old.

4 months old or when he/or she doubled there birth weight or weighs 13Lbs.
hope this helps

 You can introduce solid foods to a baby around 4-6 months old.

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11