Starting at the surface, you would have to dig nearly 2,000 miles before reaching the Earth’s core. No one could survive that trip – and the 10,000-degree F heat once there would vaporize you anyway.
3D visualisation of gravitational waves produced by two orbiting black holes.
Henze/NASA
A mix of New England and British traditions and historical events led to the particular poultry you’ll find on Thanksgiving tables everywhere.
The Seli’š Ksanka Qlispe’ Dam provides enough electricity for about 147,000 homes in the Flathead Indian Reservation in Montana.
Martina Nolte via Wikimedia Commons
Sarah Pitt, University of Brighton and Alan Gunn, Liverpool John Moores University
Snails use their slime to help them move, stop them drying out and to scare off predators.
Kindergarten students in 1952 race out of school in Los Angeles, eager to celebrate Halloween.
Los Angeles Examiner/USC Libraries/Corbis via Getty Images
From its origins as a Celtic pagan ceremony to its celebration of all things gruesome and ghoulish today, Halloween has been reinvented over the centuries.