アメリカ自然史博物館さんのインスタグラム写真 - (アメリカ自然史博物館Instagram)「Earth: home sweet home. While conditions on neighboring planets in our solar system are too harsh for life, Earth flourishes. What makes it possible? Earth is protected by a magnetic field, which is generated by a churning liquid iron core. Our planet’s dynamic insides pump out heat that help maintain a well-balanced atmosphere allowing for the molecules of life to survive. Now it’s up to us to sustain it... The Museum’s new Space Show, Worlds Beyond Earth, opens today! Head to amnh.org for details. Photo: D. Finnin/ ©AMNH」1月22日 4時25分