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).
Your Newbornâs Weight: Normal Gains and Losses and What the Average Baby Weighs At birth, the average baby weighs about 7.5 pounds â though the range of normal is between 5.5 and 10 pounds. Learn more about newborn weight gains and losses. If thereâs one way in which parents want their babies to be average, it might be when it comes to weight.