Giraffes don't go into heat, don't have a breeding season and don't make mating calls. So how do giraffes know when it's the right time for love?
What makes people experience dramatic shifts in their moods?
Narcissistic individuals tend to brag about their exploits, but it's not because their self-esteem is inflated, new research suggests.
The unusual skeleton of a holy woman buried in a crouched position in medieval times has been identified.