Broadly speaking, animals tend to be sexually dimorphic. You have males, with small gametes, and females, with large gametes, both of which are required for sexual reproduction. Every now and again, though, nature throws a curveball — producing an organism that’s a combination of both sexes, divided straight down the middle.

This condition is known as gynandromorphism, and scientists have just found the first known gynandromorphic individual of its species in a nocturnal bee native to Central and South America, Megalopta amoenae.

On its left side, the bee is physiologically male. It has a small, dainty mandible, a long antenna, and a thin, delicate hind leg with fewer bristles. The right side has female characteristics — a shorter antenna, a pronounced, toothed mandible, and a thick, hairy hind leg.

One week ago…

“Gasoline in the United States has fallen to about $2 a gallon and continues to slide. However, that price is nowhere near the least expensive in the world. Venezuela has the least expensive gas in the world at two cents per gallon.”

Ancient proteins reveal that Homo antecessor was likely a close cousin to modern humans and Neanderthals.

The fossilized bones represent the first partial skeleton assembled for a juvenile Homo naledi.

“Mechanical Ventilation” published on by Oxford University Press.