In the past many studies placed too much emphasis on how animals are trained to learn. But recently more and more studies have focused on how animals equip themselves to learn. One study started with a school field trip to a pine forest where many pine cones were discovered, stripped (剥...
So many things to chew on and we are here to feed those thoughts. Today, Kevin Clark, host of This is Football, helps sift through the playoff implications at both levels and shares his recipe for understanding the difference between matchups of both the savory and unpalatable varieties. ...
【题文】Scientists are debating how to limit their newly-discovered power to change genetic structure (结构). Scientists already modify the genes (基因) of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plant...
before biologists discovered the double helix structure of dna, alan turing, the mathematician who invented modern computing, proposed a bold theory of how animals got their patterns. turing hypothesized that as tissues develop, they pr...
a police officer in the u. s. stopped a large suv car that was going very slowly and drifting across lanes on a highway. he expected to find a driver who was either very drunk or having a medical emergency. ins...
Ⅱ阅读理解Scientists are debating how to limit their newly-discovered power to change genetic structure. Scientists have already modified the genes of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plants. These...
【71】Unfortunately the chances of any animal become a fossil are not very great, and【72】the chances of a fossil then being discovered many thousand of years later are even less.【73】It is not surprising that all the millions of animals that have lived in the past【74】we actually ...
In 1999, Tyler Lyson discovered the remains of a hadrosaur in South Dakota. The skin and muscle tissue of this fossil, nicknamed Dakota, are intact. CT scans of the preserved body have yielded many new ideas about dinosaurs' bodies and organs. The fossilized skin looks like stone, so ...
Theirthreatened species initiativecollects research on sharks using tools such as tags, sensors, drones, and satellites to better understand shark biology and movement. The non-profit launched thefirstlong-term study of large-scale shark sanctuaries and discovered deep-sea “hotspots” for sharks in ...
Scientists are debating how to limit their newly-discovered power to change genetic structure. Scientists already change the genes of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plants. These genes would cont...