The tiny twins – also known as round-eared elephant shrews – have been nicknamed Ping and Pong by zookeepers, as they are currently no bigger than table tennis balls. Sengis grow to a maximum size of just four inches (10cm) and weigh no more than 45 grams.
But, despite their small stature, the animals have an incredible genetic link to manatees, aardvarks and elephants.
Round-eared sengis are native to Botswana, Namibia and South Africa where they are found in a range of habitats including deserts, forests and savannahs.
There are nineteen different species of sengi, most of which very little is known.
A new species was discovered by conservationists working in Namibia as recently as 2014.