The origin of reproductive organs

Early in human development, during the first trimester of gestation, a fetus may have XX or XY chromosomes that indicate its sex. Yet at this stage a mass of cells known as the bipotential gonad that ultimately develops into ...

Early combined tests mimic Ariane 6 liftoff

Ariane 6 early combined tests at Latesys in Fos-sur-Mer, in France, have simulated the moment of liftoff when the umbilicals separate from the launch vehicle.

Russia puts 38 foreign satellites into orbit

Russia on Monday put 38 foreign satellites into orbit after a succesful launch from the Baikonur cosmodrome in Kazakhstan following delays due to technical issues.

SpaceX: more risks, better rockets?

A prototype of SpaceX's unmanned rocket Starship exploded on Wednesday, the third time a test flight ended in flames.

Ariane 6 upper stage heads for hot-firing tests

The first complete upper stage of Europe's new Ariane 6 launch vehicle has left ArianeGroup in Bremen and is now on its way to the DLR German Aerospace Center in Lampoldshausen, Germany. Hot firing tests performed in near-vacuum ...

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