HomeOxygen atoms in 15-million-year-old giant eggshells reveal how plants reacted to a hotter Earth – study – The Conversation Oxygen atoms in 15-million-year-old giant eggshells reveal how plants reacted to a hotter Earth – study – The ConversationAustralia Oxygen atoms in 15-million-year-old giant eggshells reveal how plants reacted to a hotter Earth – study The Conversation