The title is misleading; what was achieved here was the repopulation of decellularized mouse hearts with human cells, which is very different from building a fully-functional mouse heart.
That's io9 and "they come from the future" so they know better than you :)
io9 is just another science tabloid, I would not trust what they write too much in the first place. I doubt most of their writers have any academic knowledge of Science, but I could be wrong.
I wish hn would just go ahead and ban io9, extremetech and any other site that feels it's necessary to claim a game changing scientific breakthrough happens every single day
It's actually not that misleading when you consider that that's the technique scientists have been trying to make work for humans all along. They use a solution to strip the donor heart of all of it's cells, leaving only the scaffolding, and then re-seed it with the recipients own cells:
