How to Expand Your Knowledge of Plants & Animals Using Only Your iPhone

During a walk at a local forest preserve with a friend, she stopped to admire a broad-limbed, short tree covered in fuchsia blossoms. She guessed it was a redbud, turning to me for affirmation. I gave a slow shrug, eyebrows raised. Maybe it was? Now I wanted to know. Normally I wouldn’t have thought to...
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