An international team of researchers have discovered seven new species of tree frogs that make otherworldly calls in the rainforests of Madagascar. Their strange, high-pitched whistling calls sound more like sound effects from the sci-fi series "Star Trek.

Seven new frogs discovered in Madagascar ‘sound like something from Star Trek’ - For those who are not fans of the sci-fi series, the calls might sound like a bird or an insect.

Researchers uncover new cartilaginous fish species on the Madagascar Ridge, stressing the urgency of conservation in these little-explored waters.