Resetting the Timeline on the Evolution of Flowers

Pollen granules found in drill cores recently discovered in Switzerland have brought the evolution of angiosperms 100 million years earlier than previously thought. Their history dates back to 240 million years before the beginning of the Triassic.

These plants come from conifers, ginkgo biloba, ferns and cycads.

These flowering plants may be much faster than previously thought, but they were not consistent until about the early Cretaceous ages of about 140 million years ago. Around this time, the fossil pollen grains in the fossil record began to look uninterrupted today.

Molecular research was used to estimate the age of pollen in the past, but the earliest samples are sparsely inferior in quality in many cases, it is difficult for scientists to agree on an accurate time frame did. The newly discovered pollen particles are in very good condition, making it easier to measure samples after imaging. Peter Hochuli and Susanne Feist-Burkhardt of the Paleontology Research Institute and the University of Zurich Museum believe that their research is very solid and even more skeptical scientists believe that the evolution schedule of flowering plants is early three It was not quickly pushed back in the Tatami period but the world

About ten years ago, the same researchers discovered pollen grains different from plants that were closely related, but lived in the Middle Triassic. The current sample distance is only 3,000 kilometers (1860 miles)

There is no way to tell how these earliest flowers look. Switzerland is now rich in green, but it is more dry in the presence of these flowers.

The pollen structure suggests that insects may help pollinate early plants, but these new samples can not be helped by bees because they do not exist for over 100 million years. Instead, the beetle species is most likely to have a pollinating obligation.

This timeline highlights the major (and some minor) developments in the development of these double flowers in the digital age. One (Internet) is a network infrastructure and the other (network) is a software infrastructure. To date, they have combined more than a third of the world's population, making millions of new consumers and new information creators. The very short history of the Internet and the Internet has created three important themes or tensions. Centralize and diversify resources and knowledge 2. Apply prejudiced taxonomies to knowledge systems and self-organizing systems through related links; 3. Create one-way consumption, two way consumption and knowledge. More generally, this is a battle between closed / proprietary systems and open / universal systems, a continuous battle forming the future of the Internet and the Internet.

Scott Hamilton Kennedy: On the surface, the evolution of food is a turning point in the conversation which is controversial over genetically modified organisms (GMO). This is an important topic about food, it has problems in the first world, the third world. It was not said correctly. I think that it is necessary to reset this. Sun Hung Kai: The story of GM has been on for about 20 years. I asked our wonderful narrator Neil Degrasse-Tyson, "How do you think you will respond to this movie?", "You did not get it - no one defended the GMO "That's why he took this movie, not to protect genetically modified organisms, but to protect science.

Ceremony: "Reset" Kevin, say his full name, bouquets are placed on the platform to commemorate Kevin's father, the appearance of the beast must occur at the station, Dennis' compulsive behavior, Dennis' preparation ' According to the ceremony, Patricia led the flower to the girl's hair and led it to the kitchen, but she asked Casey to "confess and confess" after Intercom asked for a secret of help. "... she will worry, she is such a sweet woman," Dennis detained beasts from Dr. Fletcher. The hiding place and kidnapping are the secrets of other zoo staff, and Casey hid the scars of her self abuse.