Studying preserved footprints in New Mexico continues to provide insight into the first human movements in North America. A research team believes the footprints are more than 23,000 years old ...

While researchers knew the 1.5-meter-long (about 5-foot-long) slab was around 200 million years old and home to an abundance of visible dinosaur footprints, the significance of the fossil remained ...

Australian researchers have found a boulder with one of the country’s highest concentrations of dinosaur footprints, and it turns out it had been on display at a high school. The 66 fossilized ...

Choose from Boot Footprint Cartoon stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else. Video Back Videos home Signature collection ...

Choose from Cartoon Track Illustrations stock illustrations from iStock. Find high-quality royalty-free vector images that you won't find anywhere else. Video Back Videos home Signature collection ...

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Try these discussions to improve your speaking and listening. There are 20 questions in each activity - 10 for Student A and 10 for Student B. You can print out the worksheet. You can listen to the ...

Try these speed reading exercises to improve reading. You can also learn something about the news. There are reading texts at different levels. You can choose the reading speed of each text. If one ...