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A classroom activity in which students explore weight and mass by comparing the strength of gravity at different places in our Universe. Accompanies the video 'What is Gravity?'

Life began on the Earth around 3.5 billion years ago. Could life have evolved on other planets and if so where are they? Astronomers at the Royal Observatory Greenwich explain how we might detect them in this video.

In this video, Royal Observatory Greenwich astronomer Radmila demonstrates how the Doppler effect can be applied to finding planets orbiting distant stars in our galaxy called exoplanets. She carries out a short demo from which data can be collected and analysed and explains how these techniques can be applied to light and the hunt for exoplanets.

A classroom activity in which students use Hubble's law to derive the age of the Universe and consider the assumptions and sources of error associated with this calculation.

In this practical activity, students use F=ma to calculate the acceleration due to gravity and can investigate how the area of a parachute can affect the landing force of a space probe. Accompanies the video Newton's Laws of Motion.

People have travelled by sea using ships and boats for centuries. The Egyptians, Greeks and Phoenicians made some of the earliest vessels

The humble cup of tea was the most popular working-class drink by the mid-19th century.

The Spice Islands (Malaku, or the Moluccas) are a small group of islands to the north-east of Indonesia, between Celebes and New Guinea. They include Halmahera (the largest), Seram, Buru, Ambon, Ternate, and Tidore and the Aru and Kai island. They were known for being the largest producers of mace, nutmeg, cloves and pepper in the world.