In his view, ageing is about the accumulation of damage, and is not under tight genetic control. Sirtuins will, he says, probably be but a small part of a more complicated picture.
Heihe, in China's Heilongjiang province, bordering Russia, was part of a Japanese puppet state known as Manchukuo in the area of Manchuria at that time.
The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun.
The area's ship building tradition, partly established by the Vikings, also meant that sophisticated carpentry was a major aspect of the local culture.
Correspondents in the city say the raids, one of them in daylight, caused the collapse of sections of the walls around the Bab al-Azizia military complex.