This week we revealed a house hidden underground in Japan

This week on Dezeen, we showcased a house and restaurant designed by architect Junya Ishigami, which is hidden below ground level in Japan.
The house, which was built by pouring concrete into holes in the ground, contains a home and restaurant for Japanese chef Motonori Hirata, who is an old friend of the architect.
The Dezeen guide to solar power explains the qualities of different types of photovoltaics
Continuing our Solar Revolution series, we published the