Fossilized bones discovered in Texas from a flying reptile that died 89 million years ago may be the earliest occurrence of the prehistoric creature known as Pteranodon. Leer más.

The plight of the planet’s tortoises and turtles — creatures that have roamed the Earth for 220 million years — has never been greater, according to the newly released report. Leer más.

Frogs appear to be very sensitive to progestogens, a kind of pharmaceutical that is released into the environment. Female tadpoles that swim in water containing a specific progestogen, levonorgestrel, are subject to abnormal ovarian and oviduct development, resulting in adult sterility. This is shown by a new study conducted at Uppsala University and published in the journal Aquatic Toxicology. Leer más.

A report issued Feb. 22, 2011, co-authored by the Wildlife Conservation Society (WCS) working in conjunction with the Turtle Conservation Coalition, lists the 25 most endangered turtle species from around the world — some of which currently number less than five individuals. Leer más.

The Western fence lizard’s reputation for helping to reduce the threat of Lyme disease is in jeopardy. A new study led by researchers at the University of California, Berkeley, found that areas where the lizard had been removed saw a subsequent drop in the population of the ticks that transmit Lyme disease. Leer más.