Homo florensis movie

Made me think...

1. why could't early hominids leave Africa? can't they follow the food just like other predators??
2. worst reason for something to not happen in science.. "It has never happened before"
3. it is illogical to say things like "how could a small brained hominid out migrate and out survive homo sapiens" because we were hardly ever in the same area until the last few thousand years before we were alone.
4. how can someone call themselves a scientist if there not willing to accept evidence staring right at you.