Translation of "Gloriosos" in English

Es por qué los dinosaurios fueron tan gloriosos.

is why dinosaurs were so successful.

Es mucho mejor atreverse a cosas grandes, a ganar gloriosos triunfos aún si son accidentados por el fracaso, que estar entre esos pobres espíritus que viven en la penumbra gris ajena de la victoria o la derrota.

Far better it is to dare mighty things, to win glorious triumphs even though checkered by failure, than to rank with those poor spirits who neither enjoy nor suffer much because they live in the gray twilight that knows neither victory nor defeat.