bird evolution

About 66 million years ago, a giant meteorite hit Earth, wiping out three-quarters of all organisms on Earth, and warming the climate for 100,000 years.

Scientists recently claimed to have found the fossil of a feather dinosaur dating back 160 million years, the world's oldest.

From fossils, US scientists say they have discovered a small North American dinosaur quite similar to birds and has a similar way of hatching birds.