‘The How and the Why’ at TimeLine: Evolution thicker than blood as biologists clash

Review: Rachel Hardeman is 28 years old and very bright, in fact a budding evolutionary biologist. She’s also a prickly pear who wears her attitude like a badge – or perhaps a protective cape. In Sarah Treem’s fascinating play “The How and the Why,” now on clinical display at TimeLine Theatre, Rachel collides with a blood relative who may owe her a good deal – some explaining for starters – and the thorns fly. ★★★