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By lassoing lizards, putting tiny chips on their legs, and tracking them for three years, ÐÇ¿Õ´«Ã½â€™s James Stroud revealed why species often appear unchanged for millions of years despite Charles Darwin’s theory of constant evolution.

In response to changing climates, many plants and animals are moving to higher elevations, seeking cooler temperatures. But a new study finds that flying insects like bees and moths may struggle with insurmountable issues to this escape route.