1. The climate during this period of earth changed  by that time because the heat increased and it got much warmer than the climate is today on earth. The cause of the increased heat  was a big release of methane during this time. Methane is a greenhouse gas that is a part of the atmosphere and that contributet to the global warming. As you probably know, the greenhouse gases in the atmosphere forms like a roof of glass around the earth and that roof is letting the sun in but not out and this results in that the sun rays get stuck and therefore the climate is getting warmer and that is what happened during this time period. 

The consequences of the climate getting warmer at that time was that some types of corals died out and even so that some types of plankton died out as well. 

But in the last bit of this time period the climate got cooler again and that led to that the ice in Antarctica started to expand even more. 

2. The continents during this period float further apart. The fact is that North America and Europe split apart and even so did Australia and Antarctica. This resulted in that the gaps between the continents got filled with water and therefore the sea level sink. 

After the really warm climate, the climate got colder and dryer again and this caused the temperature in the ocean to sank. Then, fish started to take place in the ocean and so did the sharks. Animals like squids appeared in the ocean too. The biggest thing that happened in the ocean was that big whales appeared in the ocean. The cause for whales to appear in the ocean was that animals as big as the whales already existed on land and that animals were mammals. So you could say that the land mammals developed and took place in the ocean. 

3. One of the major events during this period was first of all that the release of the gas methane (global warming) that did the climate much warmer and caused species like plankton to die out. The warm period followed by a cooler and dryer period and that caused animals like whales to take place in the ocean. 

As the climate cooled down, open woodlands appeared in the northern hemisphere and so did grasslands appear too. Animals that survived and that thrive in environments like grasslands got supported by the new environment and caused a lot of grazing mammals to take place. 

Since the dinosaurs had died out, more species of mammals took place, like camels, and the mammals developed into many different forms. They started to dominate even in the ocean, whales started to appear. 

4. The time period before Paleogene, many of the reptiles in the ocean died out, but during Paleogene, they got replaced by mammal groups. Those mammal groups consisted of. For example, whales So the dominant species in the ocean was whales. 

On land, mammals was the animals that dominated. This was due to the extinction of the dinosaurs. The time after the extinction of the dinosaurs, the number of predators was not that high. Because of that, the mammals became more, they grew in size and in diversity. Animals like marsupials had a big spread during this time, especially in Australia and North America. This was in the beginning of Paleogene but later during this period, rodents and small horses became common. In the end of the period, cats, dogs and pigs, took place. So the dominant species during this period changed in time and that is not weirds because this period lasts for around 42 million years. 

5. As I have said before. The climate was warmer than it is today on earth during this time period. The fact is that on a lot of places on earth, the climate was tropical. 

During my period, some of the highest montain ranges are formed. The names of the ones that got formed are the Alps, Apennines, Pyrenees, Atlas mountains and Himalayas. The mountains that got formed during this time describes what the environment was like. The reason for Himalaya to get formed was that India collide with southern Asia. Due to the continents moving and mountains taking form, vulcanos  did also take form and the vulcanos had an impact on what the environment looked like in the way that the vulcanos created a 3000m thick lava blanket Deccans plateaus  in India. 

The global warming that was outstanding during this period caused a lack of water in the africa continent and that caused deserts go spread. 

In the end of the Paleogene period, the climatev got colder again and this caused Antarctica to develop a permanent ice cap. 

Flowers and conifer got more common during this period because of the different types of insects that appeared during the period. The flowers and the trees spread really fast.

Forests were really big during this time and they grew in higher latitudes. The difference in temperature from the equator and the poles were really small. Therefore did paratropic and subtropical forests grow more north and south than that kind of forests are growing today. Forests consisting of vines and palms existed in England

6. Big predators wasn't that many during this time. One predator that was common and that was dominant was the 2 meter high predator bird and that bird was called "Diatryma". 

Penguins were also a kind of animal that existed and was dominant. Maybe, it has to do with the ice cap that Antarctica developed. The fact is that penguins are living where there are ice, snow and cold so the ice cap on Antarctica is a perfect home for them. Nowadays, penguins are living in Antarctica and maybe they have been there since that time.  

Also, bears were animals that existed during this time and so existed whales that acted like predators in the oceans. As we know, whales were animals that dominated in the ocean. 

7. In "spetsbergen", existed forests with leaf trees like elm and maple. The oldest fossils records of  elm and maple are found in for ex. "spetsbergen". This shows that trees that are growing in temperated forests like elm and maple has their origin in tertiary arctis. This supports the thought about that contemporary plants has their origin from this time period. One example of a plant that developed during this time period is the grass. As I've said before, animals like horses appeared this time too and the cause of that was that the grass came this  time too. 

Fossils records that speaks for the warm climate that existed during this period is that people have found sediments in oceans and lakes near the poles. In the oceans, they have found fossils from animals that nowadays lives closer to the equator but that during that time lived near the poles. Fossils from alligators and turtles are found west of northern greenland. Greenland today, consists of almost ice, but during that time, animals like turtles lived there and that supports the fact that it wasn’t that cold in the winters like it’s today. 

Fossils records have also been found in Europe, Germany. The fossils are from pythons molds, crocodiles and tropical insects. These fossils support researcher´s thoughts about a tropical climate that occured. The fossils have been found in a lake in Germany called the “Messelsjön” and the fossils have been preserved in the sediment of the bottom of the lake. By looking the bees pollen sacs, the researchers’ can tell which flowers the bees have been on. 

8. In the first time of the period, the climate of the earth was dry and mild. But then, a release of nitrogen causes global warming of the earth and the climate got really warm. It has never been that hot ever of the earth’s history. Then, it got colder again and the sea level sink. This causes glaciers on Antarctica to get formed. Today, it still looks like that on Antarctica. It’s still glaciers there and penguins and ice bears are living there too. Antarctica is a really important place of earth because in the oceans around Antarctica, a lot of different animals are living. Many different types of fish, whales, seals and penguins are living in Antarctica.  These animals are really important for the food chains to survive and also, we are eating the fish that comes from those oceans and therefore Antarctica, is really important to protect. Because of the glaciers there, a lot of fresh water comes from that glaciers too. The global warming today, are threatening the glaciers on Antarctica and therefore people nowadays, worries about the animals that are living there.  

Many mountain ranges got formed when India and Asia collide. Today we still have these big mountain ranges like Himalaya and they are really important for people that are living near that mountain ranges. For example, people near the mountains, are getting fresh water from there and also, many people are going skiing to the different mountain ranges that got formed during Paleogene. 

The marine life got affected a lot during this period and the marine life that got formed during that time is similar to the animal composition that we have today in the oceans. 

The incredible global warming that occured during Paleogene has a big impact on us today. The incredible global warming that occurred caused many different animal species to die out. Animals that died during that time and the plant called “Azolla” that sink from the top to the bottom of the ocean due to the lack of oxygen is the background to the fossil fuels that we are using today. 

The fact is that the animals and plants that died sink to the bottom of the oceans. Over 50 million years, they turned into oil and coal. That oil and coal is the fossil fuels that we are burning up today in the shape of, cars, air planes and industries. So, the fact is that the global warming that is happening today is due to the extinction of animals and plants during Paleogene that died because of the extreme global warming by that time. 

The thing is, that we are burning up these fossil fuels that got formed over 50 million years in some hundred years. This causes a big release of greenhouse gases and as we know, the greenhouse gases blocks the sun rays to come out from earth and that is why global warming is a big problem today. 

Sources: 
- https://www.nrm.se/faktaomnaturenochrymden/fossil/livetshistoria/tertiar.8038.html
- https://www.worldbookonline.com/student-new/#/article/home/ar753784/paleogene
- https://www.livescience.com/40352-cenozoic-era.html 
- https://www.nationalgeographic.com/science/prehistoric-world/paleogene/
- https://fof.se/tidning/2004/1/artikel/varsta-vaxthuskatastrofen 
- https://www.ne.se/uppslagsverk/encyklopedi/l%C3%A5ng/paleogen