Hello, I was 14 years old when you were found and remember my mom watching the news with tears in her eyes every night! We lived in Anchorage.
With the technology we have today  am sure ou will have your answer. And I am sure your mother loved you, I am a mother of three. At one point of my life i was unable to care for my children and left them with my mom. Later they were in teh foster system and I eventually got them back.
There are so many reason why a mom would feel unable to care for an infant and she might have thought she was doing the only thing she could.
Thank God you were brought to a family who loves you and that you thrived instead of letting it eat you alive!! You got those strong genes from somewhere, I hope you find what you are looking for.
Prepare yourself for anything!
God Bless!