Rare, all-red auroras are produced by high-altitude oxygen, at heights of up to 200 miles. Nitrogen produces blue or purplish-red aurora. The connection between the Northern Lights and sunspot activity has been suspected since about 1880.
In developed countries, the average birth weight of a full-term newborn is approximately 3.4 kg (71â2 lb), and is typically in the range of 2.7â4.6 kg (6.0â10.1 lb).
Quick Answer. A typical baby blanket for newborn babies measures approximately 30 inches by 30 inches to 36 inches by 36 inches. Blankets intended for premature babies can be as small as 18 inches by 18 inches. These smaller blankets can also be used as burp cloths.