One of the world's rarest trees—a prehistoric ‘dinosaur tree’—is bearing fruit for first time after couple planted it in ...

(The rings of ancient bristlecone pines like Methuselah are more challenging ... They then use these tree-ring chronologies to date wooden objects, to determine a general area in which the wood ...

The trunk of each 'Christmas tree' (a transcription unit) represents a DNA molecule; the tree branches (granular strings attached to the DNA) are RNA molecules that have been transcribed from the DNA.