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The EXACT number of friends you need to be successful revealed (www.dailymail.co.uk)

British anthropologist and ‘mathematician of relationships’ Robin Dunbar believes we can only maintain a certain number of human connections at any one time.

Özlem Türeci: ‘Inspiring people is part of the job’

U.S. watching "escalation of armed confrontation" near Ukraine's border with Russia (www.cbsnews.com)