Despite the landing, the mission successfully placed in orbit its Dragon uncrewed cargo spacecraft. SpaceX delivery full of Christmas goodies has arrived at the International Space Station.
'Appears to be undamaged & is transmitting data.
The Falcon 9 rocket lifted off successfully at 1:16 pm Eastern Standard Time from Florida's Cape Canaveral Air Force Station, carrying 2,500 kilos of supplies, including science experiments and food for six astronauts now on board the ISS.
After the successful launch of the Falcon 9 rocket in the United States its marching step failed to return to the platform near the start.
A Seattle woman died of an infection after using her neti pot
They got worse and worse over a year, until she had a seizure - and doctors discovered the amoebas chewing away at her brain. Normally, an extra effort is required to bring on an infection; it can not be contracted by drinking contaminated water.
It's not every Friday that a 156-foot-tall SpaceX rocket booster is towed to Port Canaveral.
According to Musk, the rocket could still be re-used as its engines stabilised the spin just in time to ensure an intact landing in water.
Ocean platform landings have proven a bit trickier, but SpaceX has managed to stick the landing, whether on land or sea, 32 times in all.
Other experiments among the more than 250 on board include a new kind of mustard green lettuce that astronauts will grow in space.
The capsule is due to arrive at the space station on Saturday morning.