Beneath the bogs of New Zealand’s Northland is a massive Ngāwhā kauri, living from 41,000 to 42,500 years ago, which gives an isolated, unbroken record of a period when Earth’s magnetic field declined ...

1916: First day of the Battle of the Somme: the British Army suffers its worst day, losing 19,240 men. 1920: French tennis superstar Suzanne Lenglen beats Dorothea Chambers 6-3, 6-0 to win the ...