Mary Douglas Leakey was born #OTD in 1913.
She discovered the 1st fossilised Proconsul skull, an extinct ape which is now believed to be ancestral to humans. She discovered the robust Zinjanthropus skull at Olduvai Gorge in Tanzania. She developed a system for classifying the stone tools found at Olduvai. She discovered the Laetoli footprints, and at the Laetoli site she discovered hominin fossils that were more than 3.75 million years old.
