The Jackson's Widowbird (Euplectes jacksoni) is a species of bird in the Ploceidae family. It is found in Kenya and Tanzania. Its natural habitats are subtropical or tropical high-altitude grassland and arable land. It is threatened by habitat loss.
New research shows that the fearsome teeth of the saber-toothed cat Smilodon fatalis fully emerged at a later age than those of modern big cats, but grew at a rate about double that of their living relatives.