Today is the Summer Solstice, aka the longest day of the year, marking the beginning of our astronomical summer. Solstices occur twice every year. During each one, the Earth's axis is tilted most closely toward the sun. The hemisphere tilted most toward our home star sees its longest day, the arrival of the first day of summer. | National Geographic UK

"I've just seen how dark it is outside..." Today is the day with the fewest hours of daylight. Here's Abbie Dewhurst to explain why. | BBC Yorkshire