Cycads are ancient palm-like plants that appeared 275m years ago, long before flowering plants evolved Cycads are ancient palm-like plants that appeared 275m years ago, long before flowering plants evolved C ycads are ancient palm-like plants that appeared 275m years ago, long before flowering plants evolved. They are also the oldest known seed plants pollinated by insects, but despite their ancient roots they have an ingenious knack of advertising themselves to beetles – they heat up for sex,

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