The pair of Orcas deterring Great White Sharks

Serial killer whales have been murdering sharks and eating their livers for 5 years

NASA's InSight lander is likely retiring later this year. But thanks to its marsquake-measuring seismometer, the lander has already revealed a great deal about the internal structure of the Red Planet. Here's the basics of what different seismic waves (p-, s-, Rayleigh, and Love waves) can teach us.

Megatooth sharks may have been higher on the food chain than any ocean animal ever