Question: Read this and answer the question

According to mtDNA studies by Holden (2005) and Richards et al. (2006), a significant proportion of the maternal lineages of Somalis consists of the M1 haplogroup. This mitochondrial clade is common among Ethiopians and North Africans, particularly Egyptians and Algerians. M1 is believed to have originated in Asia, where its parent M clade represents the majority of mtDNA lineages. This haplogroup is also thought to possibly correlate with the Afro-Asiatic language family:

Who authored an mtDNA study in 2005?
Answer: Holden
Question: Read this and answer the question

However, in order to manage the tensions present in the Spanish transition to democracy, the drafters of the current Spanish constitution avoided giving labels such as 'federal' to the territorial arrangements. Besides, unlike in the federal system, the main taxes are taken centrally from Madrid (except for the Basque Country and Navarre, which were recognized in the Spanish democratic constitution as charter territories drawing from historical reasons) and then distributed to the Autonomous Communities.

How did they manage the tensions in the present of Spanish Transition to democracy?
Answer: the drafters of the current Spanish constitution avoided giving labels such as 'federal' to the territorial arrangements.
Question: Read this and answer the question

In 1964, Paul VI created a Secretariat for non-Christians, later renamed the Pontifical Council for Interreligious Dialogue and a year later a new Secretariat (later Pontifical Council) for Dialogue with Non-Believers. This latter was in 1993 incorporated by Pope John Paul II in the Pontifical Council for Culture, which he had established in 1982. In 1971, Paul VI created a papal office for economic development and catastrophic assistance. To foster common bonds with all persons of good will, he decreed an annual peace day to be celebrated on January first of every year. Trying to improve the condition of Christians behind the Iron Curtain, Paul VI engaged in dialogue with Communist authorities at several levels, receiving Foreign Minister Andrei Gromyko and Chairman of the Presidium of the Supreme Soviet Nikolai Podgorny in 1966 and 1967 in the Vatican. The situation of the Church in Hungary, Poland and Romania, improved during his pontificate.

What is celebrated by the Catholic church on January 1 of every year?
Answer:
peace day