slow down after 20, new findings disprove theirs. sebastian, we all meant to be happy? h0??? disprove theirs. sebastian, we all meant to be happy? disprove theirs. sebastian, we all meant to be happy? how can you not be ha - meant to be happy? how can you not be happy by meant to be happy? how can you not be happy by this? meant to be happy? how can you not be happy by this? particularly - be happy by this? particularly somebody who s on the other side of 30 now somebody who s on the other side of 30 now this somebody who s on the other side of 30 now. this research is a big news is that 30 now. this research is a big news is that it 30 now. this research is a big news is that it covers 1.5 million people and it is that it covers 1.5 million people and it shows that essentially we reach and it shows that essentially we reach our and it shows that essentially we reach our peak mental capacity at the end reach our peak mental capacity at the end of reach our peak menta