TechnologyMaterial that sends sound from water to air could help eavesdroppers Sound can't normally travel from beneath water's surface to the air above due to a mismatch in densities, but a new material changes that News
LifeWoolly mammoths had testosterone surges like those of male elephants Hormone measurements from the tusk of a male woolly mammoth show these animals went through musth, a seasonal peak in testosterone seen in elephants News